And you shall keep My statutes and practice them. I am the LORD who sanctifies you.
Moses is here directed to say that again to the children of Israel which he had in effect said before, Lev 20:2. We are sure it was no vain repetition, but very necessary, that they might give the more earnest heed to the things that were spoken, and might believe them to be of great consequence, being so often inculcated.
Commenting on Leviticus 20:1-9
And ye shall keep my statutes, and do them,.... Not only those respecting the above things, but all others, which would be a means of preserving them from sin, and of promoting holiness in their lives and conversations: I am the Lord which sanctify you: who had separated and distinguished them from all other people on earth, and who had given them holy laws, as...
Lev 20:7-8 For the Israelites were to sanctify themselves, i.e., to keep themselves pure from all idolatrous abominations, to be holy because Jehovah was holy (Lev 11:44; Lev 19:2), and to keep the statutes of their God who sanctified them (Exo 31:13).
Commenting on Leviticus 20:7-8