keep Mine ordinance. This is the Figure of speech Polyptoton (App-6). "observe My observance", but, Eng. keep My charge.
customs. statutes: because they were legal enactments of the land, Compare Leviticus 18:3. The word is rendered "statutes" in Deuteronomy 6:24; Deuteronomy 16:12, and Deuteronomy 26:16.
I am the LORD your God. This body of laws (Leviticus 18) is emphasized and solemnized by beginning and ending with the same expression. Figure of speech Epanadiplosis. See App-6.