Ohalos, Chapter 9, Mishnah 12. Throughout this chapter we have been following a single object, a kaveres (a beehive), through case after case, watching how tumah behaves within it, above it and beneath it. One detail keeps deciding every outcome: does the kaveres rest directly upon the ground, or is there a tefach of clearance under it? A tefach of empty height is never merely empty; it carries the status of an ohel in its own right. In our mishnah the kaveres is tipped onto its side in the open air, with nothing over it but the sky, and the familiar sequence of questions is put to it once again.
The Case: Outdoors, With a Tefach of Clearance
The opening words are "haysah gevohah min ha'aretz tefach", meaning that the kaveres was positioned a tefach up from the ground. No house enters this picture at all. Picture it in a courtyard or a garden, lying on its side, its wall held a tefach clear of the earth. That pocket of air below it now qualifies as an ohel.
The entire first half of the mishnah rests on a single assumption: that the kaveres counts as a keli, a vessel. (A dissenting view will surface before the mishnah ends; until then we are following the Tanna Kamma, for whom a hive in use is a vessel.) A keli behaves in two ways at once, and both must be kept in view: tumah travels through it freely, so it affords no shelter, and at the same time the area it roofs is able to carry tumah sideways.
Tumah Below the Kaveres or Resting On It
The ruling is "tumah tachtehah o al gabah, hakol tamei ela tocho". Should a kezayis of tumah be found under the kaveres, or lying upon its outer surface, everything turns tamei apart from the space within.
Trace the path the tumah takes. Begin with the kezayis lying below. A full tefach separates the earth from the underside of the kaveres, and that gap is itself an ohel, so the tumah does not restrict itself to a narrow column but occupies the whole breadth of the space underneath. Since a vessel holds nothing back, all of that tumah then proceeds upward. The consequence is that objects resting at any point on the kaveres become tamei, not merely whatever happens to sit over the kezayis, because the tumah had already taken the full width below before it began to climb. Whatever is stored within the kaveres, however, is spared.
Reverse the case and place the kezayis on the surface above. The tumah comes straight down, the vessel offering no obstacle whatever. Arriving below, it meets a gap a tefach high, and there it broadens across the whole area, so that everything under the kaveres is tamei. Here too, the contents inside remain untouched.
The result, then, is identical in either direction, above or below: given a tefach of clearance underneath, all is tamei "ela tocho", excepting the interior, which is rescued.
Tumah Within It
The mishnah proceeds: "besocho, hakol tamei". When the kezayis of the meis lies inside the kaveres, tumah takes hold everywhere: within, on the surface above and in the space below.
The logic runs along the same lines. Tumah placed inside occupies the entire cavity across its full breadth. Unable to arrest tumah, the kaveres lets it descend, and below it lies a tefach of space forming an ohel, so that whole region is tamei. It rises as well, for if a vessel cannot check tumah coming at it from underneath, it will certainly not check tumah lodged in its own space. And since the cavity was filled throughout, whatever lies at any point upon the kaveres is affected, not only what stands directly over the kezayis.
When Does It Still Count as a Keli?
Now the mishnah limits all of the above: "bameh devarim amurim? Bizman shehu keli". Everything stated so far holds only while the kaveres retains the standing of a vessel, and a vessel, as described, conveys tumah and is powerless to arrest it.
But "haysah pechusah unekukah usesumah bekash": if the kaveres was damaged and holed, and the breach was stopped up with straw, its standing as a vessel is finished. It can no longer serve as a hive, and packing straw into the gap does not count as a genuine repair. Having ceased to be a vessel, it now falls under the law of an ohel, and an ohel does hold tumah back.
A New Shittah: The Chachamim and Arba'im Se'ah
At this point the mishnah offers a second route by which a kaveres may shed the name of vessel, and it amounts to a genuine chiddush, a real change of direction.
Repeatedly until now, and with good reason, we have said that a kaveres which is machzekes arba'im se'ah, whose capacity reaches forty se'ah of liquid, is immune: its very size places it beyond the reach of tumah, and it stays tahor. Nevertheless, so long as it continues to serve as a hive it retains the name of a vessel, and therefore it transmits tumah while providing no protection. That has been our working assumption all along, and it belongs to the Tanna Kamma.
The Chachamim hold otherwise. To their mind, a kaveres of forty se'ah capacity, which for that very reason is beyond contracting tumah, is by the same token a barrier against tumah. Even while it is fully in service as a hive? Precisely so. No middle position is available: an object is either liable to tumah or it is not, and if its dimensions place it out of reach, then notwithstanding its active use as a hive and the title of vessel that would seem to attach to it, we apply to it the entire law of an ohel. Transmitting tumah is not its only function; halting tumah belongs to it as well. Nothing we have learned until now prepared us for this.
The point is worth repeating, because the shift is a major one. Our earlier assumption ran thus: granted that a forty se'ah kaveres keeps itself tahor, still, being employed as a hive it bears the title of vessel, an ohel that transmits tumah and is helpless to stop it. The Chachamim answer: a capacity of forty se'ah that keeps it beyond the reach of tumah makes it a barrier too. It is simply an ohel like any other.
Two paths therefore lead to treating the kaveres as an ohel and not a vessel. Either it broke and the hole was stopped with straw, which by every view ends its life as a vessel, or it is machzekes arba'im se'ah and thus altogether beyond tumah, which by the shittah just introduced likewise strips it of the title of vessel. "Kedivrei Chachamim", according to the Chachamim who take issue with the Tanna Kamma: whatever cannot itself contract tumah is not governed by the laws of a vessel, and it does form a barrier.
The Halachos of a Kaveres That Is an Ohel
Having established that we are now dealing with an ohel rather than a vessel, the mishnah lays out the consequences. It begins with the kaveres lying flush against the earth, with no tefach beneath it, whether this be the broken kaveres or the forty se'ah one as the Chachamim understand it.
"Kezayis min hameis nasun tachtehah": when a kezayis of a meis has been set below it, the ruling is "kenegdo ad hatehom", that tumah reaches only the strip immediately in line with it, descending as deep into the earth as one could ever dig. Its movement is confined to that vertical line, since without a tefach of space below, nothing carries it sideways.
"Al gabah": with the tumah resting on the outer surface, we rule "kenegdo ad haraki'a", that the column rising directly above it is tamei all the way to the heavens, nothing being present to check it. That, however, is the whole of it. Tumah on the surface reaches neither the contents of the kaveres nor the region under it, and tumah below reaches neither the contents nor anything resting above, since on this shittah we have an ohel before us, and an ohel arrests tumah.
And with the tumah lodged inside: "besocho, ein tamei ela tocho", the cavity alone is tamei, and nothing above it or beneath it.
The Ohel With a Tefach Beneath
Lastly, "haysah gevohah min ha'aretz tefach": take that same broken kaveres, or the forty se'ah kaveres as the Chachamim rule, and set it a tefach up from the ground. An ohel has now come into being below it, the distance from the earth to its underside being a full tefach.
The ruling is "tumah tachtehah, tachtehah tamei". Tumah lying below is no longer confined to a downward line; the whole area under the kaveres becomes tamei, that space being an ohel in its own right.
"Besocho, tocho tamei": with tumah lodged in the cavity, the cavity alone becomes tamei and nothing beyond it, neither the surface above nor the region below, since what we have here is an ohel and not a vessel, and it keeps the tumah where it lies.
"Al gabah, kenegdo ad haraki'a": tumah set upon the surface renders tamei the column above it, up to the sky, there being nothing in its path. The cavity of the kaveres, though, is safe, and so is the entire region below it, including the portion lying immediately under the tumah. Since we are not speaking of a vessel liable to tumah, the tumah is held at the surface.
Reviewing the Mishnah
Let us draw the mishnah together. Our subject is a kaveres lying on its side out in the open. Not a word appears about a house, about tumah in a house or tumah making its way into one, because no house has any bearing here: the kaveres stands in the courtyard or the garden, beneath the open sky.
- A functioning kaveres held a tefach above the earth (Tanna Kamma): it counts as a vessel, transmitting tumah without arresting it. Tumah below it or on its surface renders everything tamei save the cavity; tumah in the cavity renders everything tamei, within, above and beneath.
- A kaveres that is no vessel (broken and stopped with straw by every view, or of forty se'ah capacity according to the Chachamim) resting flat upon the earth: tumah below it extends downward alone, to the depths; tumah on its surface extends upward alone, to the heavens; tumah in the cavity affects the cavity alone.
- That same non-vessel with a tefach beneath it: tumah below turns the entire space under it tamei; tumah in the cavity affects the cavity alone; tumah on its surface renders tamei only the column rising upward, while the cavity and the whole region below stay protected.
A single tefach of air, and a single question of definition, vessel or ohel, separate outcomes as far apart as these. Therein lies the beauty of our mishnah: one beehive, one courtyard, and the halachah turning entirely on how it is positioned and what name it bears.