Leviticus 20:12

20:12 If a man has sexual intercourse with his daughter-in-law, both of them must be put to death. They have committed perversion; ¹  their blood guilt is on themselves.

Leviticus 18:23

18:23 You must not have sexual intercourse ²  with any animal to become defiled with it, and a woman must not stand before an animal to have sexual intercourse with it; ³  it is a perversion. ⁴ 

[20:12]  ¹ tn The Hebrew term תֶּבֶל (tevel, “perversion”) derives from the verb “to mix; to confuse” (cf. KJV, ASV “they have wrought confusion”).

[18:23]  ² tn See the note on v. 20 above.

[18:23]  ³ tn Heb “to copulate with it” (cf. Lev 20:16).

[18:23]  ⁴ tn The Hebrew term תֶּבֶל (tevel, “perversion”) derives from the verb “to mix; to confuse” and therefore refers to illegitimate mixtures of species or violation of the natural order of things.