(30) Therefore shall ye keep mine ordinance. As God is no respecter of persons, and as He will assuredly visit His own people with the same punishment which He inflicted upon the former occupants of the laud, the Israelites are to take special care to keep inviolate His ordinances.

Commit not any one of these abominable customs, which were committed before you. Better, Do not any one of these abominable statutes which were done, as the Authorised Version translates the word in Deuteronomy 6:24; Deuteronomy 16:12; Deuteronomy 26:16. These abominations were not practised simply as customs, but were legally enacted as statutes of the land, and formed part of their religious institutions (see Leviticus 18:3). A similar state of degeneracy is described by Isaiah, who tells us that the Divine statutes, which is the same word used in the passage before us, were changed. By deviating here from the usual rendering of this phrase the Authorised Version mars the import of the passage.

I am the Lord your God.--This is the declaration with which this group of laws was introduced. Its repetition at the end imparts peculiar solemnity to these enactments. (See Leviticus 18:1.)

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.Therefore shall ye keep mine ordinance,.... Whatever the Lord appointed them and commanded, whether contained in this chapter, or elsewhere:

that ye commit not anyone of these abominable customs; for attending to the ordinances of God, and a close in them, they would be preserved from the commission of such abominable things, and giving in to such detestable customs as before warned against:

which were committed before you; by the inhabitants of Canaan; and by the punishment on them for them they might be deterred from doing the same:

and that ye defile not yourselves therein; for though the land is so often said to be defiled, yet, properly speaking, and chiefly, it was the inhabitants that were defiled by their abominable customs; and so would the Israelites also, should they observe the same, and thereby become abominable in the sight of God, and incur his displeasure, and be liable to his vengeance:

I am the Lord your God; who had a sovereign authority over them, and a right to give out what commands he pleased, both negative and affirmative; and to whom they were under obligations to obey, as the God of nature and providence, from whom they had their beings, and were supported in them, and as their covenant God, who had bestowed special and spiritual favours on them.