R. Nathan says: The verse "under its mother" comes to be expounded, viz.: "under its mother"—after its mother has died. You say "under its mother"—after its mother, but perhaps it is to be understood literally, (i.e., near its mother)?—You reason thus: It is written here "its mother," and elsewhere, "its mother" ([Devarim 14:21] "You shall not cook a kid in its mother's milk.") Just as there, (the meaning is "(milk) of the same kind" (as it is, i.e., both it and the milk being of the same source), so, here, "of the same kind." [This has a specific halachic implication.]