פירוש על עבודה זרה 10:11

The Talmud believes that this verse is needed to exclude the “trefa” an animal that will soon die. Such an animal cannot be sacrificed. But perhaps one missing a limb can be sacrificed by Noahides?
The resolution is that the prohibition of sacrificing a “trefa” is derived from a different verse, “to keep seed alive.”

If one holds that by definition a “trefa” cannot give birth, then it makes sense to exclude it from the phrase, “to keep seed alive.” But what about those who hold that a “trefa” can give birth. We would then need the earlier verse to exclude the trefa and we would have no verse to exclude the animal missing a limb.
The Talmud finds a new way of excluding the trefa—from the word “with you.” The animals that Noah sacrifices must be like Noah—able to bear offspring and not trefot.