Pesachim, Chapter 6, Mishnah 4. Before us is a further halachah concerning the Chagigah offering, in which the Mishnah lists its laws and sets them alongside the laws of the Pesach offering.
The laws of the Chagigah compared with the Pesach offering:
"Haba'ah min hatzon umin habakar" - the Chagigah, unlike the Pesach offering, may come either from the flock or from the herd: from cows, from oxen and the like. The Pesach offering, by contrast, comes only from sheep or from goats.
"Min hakevasim umin ha'izim" - in this point the Chagigah is the same as the Pesach offering, which also comes from sheep or from goats.
"Min hazecharim umin hanekevos" - the Chagigah is valid whether it is male or female, because it is a shelamim offering, and a shelamim offering comes from a male or a female alike. The Pesach offering, however, must come specifically from a male.
"Vene'echeles lishnei yamim v'lailah echad" - the time for eating it extends over two days and one night: the day of the slaughter, the night that follows, and the next day until sunset. This too is the law of a shelamim offering, and in this the Chagigah differs from the Pesach offering, which is eaten on that night alone.
A limitation on the time for eating: the concern that it mixed with the Pesach:
What the Mishnah said, that the Chagigah is eaten for two days and one night, applies only when it remained unaffected by the Pesach offering. But when the Chagigah lies on the same table together with the Pesach offering, there is reason to be concerned that some of the Pesach offering became mixed into it and it absorbed from it. In such a case the laws of the Pesach offering apply to it, and it may be eaten on that night alone.
In summary: in this Mishnah we learned the laws of the Chagigah offering: it comes from the flock and from the herd, from sheep and from goats, from males and from females, and it is eaten for two days and one night, in accordance with the law of a shelamim offering, and in all of these it differs from the Pesach offering, which comes only from male sheep and goats and is eaten for one night. We also learned that if some of the Pesach offering became mixed into the Chagigah, the laws of the Pesach apply to it and it is eaten on that night alone.