And the Lord spake unto Moses,.... He continued speaking to him, after he had delivered to him the laws respecting the day of atonement, and the bringing of the sacrifices to the door of the tabernacle, and particularly concerning the Israelites not worshipping devils, as they had done in Egypt: the Lord proceeds to deliver out others, the more effectually to guard against both the immoral and idolatrous practice, of the Egyptians and Canaanites:

saying, as follows.

Holiness of the Marriage Relation. - The prohibition of incest and similar sensual abominations is introduced with a general warning as to the licentious customs of the Egyptians and Canaanites, and an exhortation to walk in the judgments and ordinances of Jehovah (Leviticus 18:2-5), and is brought to a close with a threatening allusion to the consequences of all such defilements (Leviticus 18:24-30).

Leviticus 18:1-4

By the words, "I am Jehovah your God," which are placed at the head and repeated at the close (Leviticus 18:30), the observance of the command is enforced upon the people as a covenant obligation, and urged upon them most strongly by the promise, that through the observance of the ordinances and judgments of Jehovah they should live (Leviticus 18:5).

And the LORD spake unto Moses, saying,

CHAPTER 18

Le 18:1-30. Unlawful Marriages.

18:1-30 Unlawful marriages and fleshly lusts. - Here is a law against all conformity to the corrupt usages of the heathen. Also laws against incest, against brutal lusts, and barbarous idolatries; and the enforcement of these laws from the ruin of the Canaanites. God here gives moral precepts. Close and constant adherence to God's ordinances is the most effectual preservative from gross sin. The grace of God only will secure us; that grace is to be expected only in the use of the means of grace. Nor does He ever leave any to their hearts' lusts, till they have left him and his services.