Chullin, Chapter 5, Mishnah 2. This chapter is built around the prohibition of oto ve'et beno, taking a mother animal and its young for shechitah on one and the same day. Our mishnah resumes the catalogue of cases opened in the previous mishnah, running now from the fifth through the twelfth. In each of these situations oto ve'et beno is layered together with two further issues: kodashim slaughtered beyond the azarah rather than within it, and chullin slaughtered within the azarah, the problem known as chullin ba'azarah. One by one the mishnah sorts out which animal remains usable, which is disqualified, and which of the two shochtim bears a penalty.
Case five: chullin and kodashim, both outside
"Chullin vekodashim bachutz": the animal taken first was unconsecrated, the animal taken second was consecrated, and each shechitah was performed beyond the azarah. "Harishon kasher upatur": the earlier animal may be eaten, and the man who slaughtered it has done nothing wrong at all, for chullin belongs outside the Beit Hamikdash and that is precisely where he slaughtered it. "Vehasheini sofeg et ha'arba'im upassul": whoever performed the later shechitah is given the forty lashes on account of oto ve'et beno, and no use whatsoever may be made of the animal he slaughtered.
There is something worth noticing in this ruling. The animal of the later shechitah was kodashim, and the shechitah took place away from the azarah, which on its own would normally be an independent offense. Yet since this animal came second in the pair, oto ve'et beno had already stripped it of any standing as a korban. An animal that had no possibility of being offered on Har Habayit in the first place does not create liability for shechutei chutz, so all that remains is the forty lashes of oto ve'et beno.
Case six: kodashim and chullin, both outside
"Kodashim vechullin bachutz": here the order is reversed. The earlier shechitah was performed on a consecrated animal, the later one on an unconsecrated animal, and both took place beyond the azarah. "Harishon chayav karet upassul": karet attaches to the man who performed the earlier shechitah, since he slaughtered a korban away from its designated place, and the animal is disqualified as any korban slaughtered outside would be. "Vehasheini kasher": the later animal may be eaten. The shechitah did indeed involve a breach of oto ve'et beno, but that prohibition never bars benefit from the meat, and chullin slaughtered away from the Beit Hamikdash was slaughtered exactly where it belongs.
"Ushteihem sofgin et ha'arba'im": each of the two shochtim takes the forty lashes. The earlier one is lashed because he performed shechitah on a korban in a location where it cannot be offered, and the later one because he breached oto ve'et beno.
Case seven: chullin and kodashim, both inside
"Chullin vekodashim bifnim": the earlier animal was unconsecrated, the later one consecrated, and both shechitot were performed within the azarah. "Sheneihem pesulin": neither animal may be used at all. The earlier one falls under chullin ba'azarah, unconsecrated meat slaughtered within the Temple courtyard, from which no benefit may be taken. The later one lost its standing through the breach of oto ve'et beno. "Vehasheini sofeg et ha'arba'im": the forty lashes fall on the man who performed the later shechitah, for oto ve'et beno. No lashes at all attach to the earlier shochet, because bringing chullin into the azarah and slaughtering there is not an offense punishable by malkut.
Case eight: kodashim and chullin, both inside
"Kodashim vechullin bifnim": now the consecrated animal was slaughtered first and the unconsecrated one afterwards, both of them within the azarah. "Harishon kasher upatur": the korban is valid and its shochet goes free of every penalty, for nothing he did was out of place; he brought kodashim into the Temple courtyard and performed the shechitah there. "Vehasheini sofeg et ha'arba'im upassul": the forty lashes fall on the later shochet for oto ve'et beno, and no use may be made of his animal, exactly as the law of chullin ba'azarah dictates.
Case nine: chullin, the first outside and the second inside
"Chullin bachutz uvifnim": both animals here were unconsecrated, the earlier one slaughtered beyond the azarah and the later one within it. "Harishon kasher upatur": that animal is permitted for eating and its shochet did nothing amiss, since chullin slaughtered away from the Beit Hamikdash is slaughtered in its proper place. "Vehasheini sofeg et ha'arba'im upassul": the later shochet takes the forty lashes for oto ve'et beno, and no benefit may be derived from the animal, under the usual rule governing chullin brought into the Temple courtyard.
Case ten: kodashim, the first outside and the second inside
"Kodashim bachutz uvifnim": two consecrated animals, the earlier slaughtered away from the azarah and the later one inside it. "Harishon chayav karet": karet attaches to the earlier shochet for performing shechitah on a korban outside its designated place, while oto ve'et beno does not touch him at all, his being the first of the two. "Ushneihem pesulin": no use may be made of either animal. The earlier one because kodashim were slaughtered beyond the azarah, and the later one because, correct as its location was, the shechitah breached oto ve'et beno and the animal can no longer serve as a korban. "Ushneihem sofgin et ha'arba'im": malkut for both, the earlier shochet for shechutei chutz and the later one for oto ve'et beno.
Case eleven: chullin, the first inside and the second outside
"Chullin bifnim uvachutz": both animals were unconsecrated, the earlier one slaughtered within the azarah and the later one outside it. "Harishon passul upatur": no use may be made of that animal, this being the law of chullin ba'azarah, unconsecrated meat slaughtered inside the Temple courtyard, while the shochet escapes malkut, since no lashes are attached to that offense. "Vehasheini sofeg et ha'arba'im vekasher": the forty lashes fall on the later shochet for oto ve'et beno, yet the meat itself is permitted for eating. Nothing clings to it beyond oto ve'et beno, which does not forbid benefit, and it was chullin slaughtered away from the Beit Hamikdash, precisely where chullin ought to be slaughtered.
Case twelve: kodashim, the first inside and the second outside
"Kodashim bifnim uvachutz": two consecrated animals, the earlier slaughtered within the azarah and the later one beyond it. "Harishon kasher upatur": that korban stands and its shochet incurs nothing, for kodashim were brought into the Temple courtyard and slaughtered there, a shechitah carried out exactly as it should be. "Vehasheini sofeg et ha'arba'im": the later shochet is given the forty lashes for breaching oto ve'et beno, and his animal can no longer come upon the altar, having been kodashim slaughtered away from the azarah.
One final point rounds out the whole list. Ordinarily, when a person slaughters a consecrated animal outside the Beit Hamikdash he is liable both for malkut and for karet. Here, however, since the first of the pair had already been slaughtered, the second animal was disqualified by oto ve'et beno before this shechitah ever took place. Since it was already unfit to be offered, its slaughter outside does not carry karet, and the slaughterer is left with the forty lashes for oto ve'et beno alone.