四分律行事鈔資持記 3.323

3.323

引小中，初科。為一眾殺而制七眾者，以同沾佛戒，意所通故。彼律得食三種淨肉，謂不見、不聞、不疑為我故殺者。是知雖云得食，還同禁斷。下引《四分》，其意益明。

In citing the Hīnayāna: the first section. Prohibiting the seven assemblies on account of killing for one assembly is because they equally receive the Buddha's precepts, and the intent extends to all. That vinaya allows eating three kinds of pure meat, meaning not seen, not heard, and not suspected to have been killed for one's sake. From this we know that although it says one may eat it, it is still the same as prohibition. The Dharmaguptaka cited below makes its meaning even clearer.