Whoever cursed father or mother was to be punished with death (Leviticus 19:3); "His blood would be upon him." The cursing of parents was a capital crime (see at Leviticus 17:4, and for the plural דּמיו Exodus 22:1 and Genesis 4:10), which was to return upon the doer of it, according to Genesis 9:6. The same punishment was to be inflicted upon adultery (Leviticus 20:10, cf. Leviticus 18:20), carnal intercourse with a father's wife (Leviticus 20:11, cf. Leviticus 18:7-8) or with a daughter-in-law (Leviticus 20:12, cf. Leviticus 18:17), sodomy (Leviticus 20:13, cf. Leviticus 18:22), sexual intercourse with a mother and her daughter, in which case the punishment was to be heightened by the burning of the criminals when put to death (Leviticus 20:14, cf. Leviticus 18:17), lying with a beast (Leviticus 20:15, Leviticus 20:16, cf. Leviticus 18:23), sexual intercourse with a half-sister (Leviticus 20:17, cf. Leviticus 18:9 and Leviticus 18:11), and lying with a menstruous woman (Leviticus 20:18, cf. Leviticus 18:19). The punishment of death, which was to be inflicted in all these cases upon both the criminals, and also upon the beast that had been abused (Leviticus 20:15, Leviticus 20:16), was to be by stoning, according to Leviticus 20:2, Leviticus 20:27, and Deuteronomy 22:21.; and by the burning (Leviticus 20:14) we are not to understand death by fire, or burning alive, but, as we may clearly see from Joshua 7:15 and Joshua 7:25, burning the corpse after death. This was also the case in Leviticus 21:9 and Genesis 38:24.

Leviticus 20:15 Parallel Commentaries

Leviticus 18:23 Neither shall you lie with any beast to defile yourself therewith: neither shall any woman stand before a beast to lie down thereto...

Exodus 22:19 Whoever lies with a beast shall surely be put to death.

Deuteronomy 27:21 Cursed be he that lies with any manner of beast. And all the people shall say, Amen.