The Master said: 'If [it calved] before sentence, the calf is permitted'; implying, even if it was with calf when it gored. But did not Raba say: The calf of a cow that gored is forbidden, because the mother and the calf gored; the calf of a cow subjected to bestiality is [likewise] forbidden because the mother and the calf were thus subjected! — Say thus: If the calf was conceived and born before its mother was condemned, it is permitted [for use]; but if conceived and born after sentence, it is forbidden. Now, this agrees with the view that the product of two things [one being forbidden] is itself forbidden;