Kedoshim, Chapter 11
1) (Vayikra 20:15) ("And if a man gives his lying to a beast, he shall be put to death, and the beast you shall kill.") "And a man": to exclude a minor. "who gives his lying to a beast" — whether full grown or not. "he shall be put to death": by stoning. You say by stoning, but perhaps it is by one of the other death penalties in the Torah; it is, therefore, written "and the beast you shall kill," and, elsewhere (Devarim 13:10) "You shall surely kill him." Just as there, by stoning; so, here, by stoning.