Левит 20:27

But because Israel was called to be the holy nation of Jehovah, every one, ether man or woman, in whom there was a heathenish spirit of soothsaying, was to be put to death, viz., stoned (cf. Lev 19:31), to prevent defilement by idolatrous abominations.

The laws which before were made are in this chapter repeated and penalties annexed to them, that those who would not be deterred from sin by the fear of God might be deterred from it by the fear of punishment. If we will not avoid such and such practices because the law has made them sin (and it is most acceptable when we go on that principle of religion), surely we shall avoid them when the law has made them death, from a principle of self-preservation. In this chapter we have, I. Many particular crimes that are made capital. I. Giving their children to Moloch (Lev 20:1-5). 2. Consulting witches (Lev 20:6, Lev 20:27). 3. Cursing parents (Lev 20:9). 4. Adultery (Lev 20:10). 5. Incest (Lev 20:11, Lev 20:12, Lev 20:14, Lev 20:17, Lev 20:19-21). 6. Unnatural lusts (Lev 20:13, Lev 20:15, Lev 20:16, Lev 20:18). II. General commands given to be holy (Lev 20:7, Lev 20:8, Lev 20:22-26).