The preceding two chapters specify correct behavior. This one sets forth the punishments for disobedience. Chapters 18-19 already discussed most of the subjects dealt with in this chapter.
"The difference between the laws in this chapter and previous ones lies in their form. Those in chs. 18-19 are apodictic in form; that is, they forbid or command certain types of behavior but they rarely indicate what the consequences of disregarding these rules would be. In contrast, the laws in this chapter are casuistic; that is, they state what must be done should one of the apodictic rules be broken. They set out what will befall a law-breaker in such a case. In this way they supplement and reinforce what is found in earlier chapters."235
"Although the content of Leviticus 18 and 20 is virtually identical, it is possible to make a distinction between the intended audiences of the chapters. Whereas Leviticus 18 addresses the would-be offender of a God-given decree, Leviticus 20 addresses the Israelite community, which was responsible for seeing that violations of Law receive their just reward."236
"This selection of laws consists of fourteen (7x2) laws, concluded by an extended appeal for holiness on the part of the nation when they take possession of the land of Canaan (vv. 22-26). After the conclusion, one of the laws, the prohibition of mediums and spiritists (v. 6), is restated (v. 27)."237
20:1-8 Idolatry and spiritism are the focus of this section. The people were to execute a Molech worshipper by stoning. If they failed to put him or her to death, God Himself would judge the guilty person with death. He would do this to the person who resorted to mediums or spiritists too since this practice sought information about the future from evil spirits rather than from God.
20:9-21 Cursing parents was also punishable by stoning.
Stoning ". . . was the usual punishment appointed in the law for cases in which death was inflicted . . ."238
Several sexual sins described here drew this penalty. The law banned the marital unions alluded to in verses 14, 17, and 21. Consequently these verses may be referring to common law marriages in which people lived together as husband and wife without a wedding ceremony.239Burning the criminals (v. 14) took place after their execution to heighten the general perception of the wickedness of their sin (cf. Gen. 38:24; Lev. 21:9; Josh. 7:15, 25).
God would judge these sexual sins by withholding children from the guilty parties.
"Whereas in certain respects OT penal law was much more lenient than that of neighboring contemporary cultures, it was more strict with regard to offenses against religion and family life."240
20:22-27 This chapter, as chapter 18, concludes with an exhortation and warnings to obey God's ordinances. In view of Israel's unique vocation in the world the nation was to live differently from other peoples. The Israelites would possess the Promised Land to the extent that they maintained their holiness.
No matter how lightly the Israelites may have regarded the type of conduct reflected in this chapter, in God's sight it constituted serious sin and deserved the severest punishment.
"This theme runs through chs. 11-20: the elect people of God must visibly embody the character of God. In their choice of food, in sickness and in health, in their family life, in their honest and upright dealing, and in their love of neighbor, they show the world what God is like."241
