Shall be surely put to death — That is, by stoning. (See Leviticus 20:2.) This precept is also to be found in Exodus 21:17; Proverbs 20:20, and is referred to by our Lord (Matthew 15:14; Mark 7:10).
His blood shall be upon him — That is, he has brought it upon himself to be killed. (See Joshua 2:19.) This phrase, which occurs seven times either in the singular or plural, is only to be found in this chapter (See Leviticus 20:9; Leviticus 20:11-13; Leviticus 20:16; Leviticus 20:27). According to the authorities during the second Temple, it carried with it death by lapidation.
(10) Shall surely be put to death. — This is, by penalty for the sin forbidden in Leviticus 18:20. According to Jewish tradition whenever the phrase “shall surely be put to death” occurs by itself, it denotes death by strangling. This death was inflicted for six crimes — upon him who had commerce with another man’s wife; who smote his father or mother; (3) who stole an Israelite; (4) who being an elder rebelled against the decree of the senate (Deuteronomy 17:12); (5) who played the false prophet; and (6) who prophesied in the name of another god.