Deuteronomy 5:12

Observe A.V. keep, instead of remember, Exodus 20:8. In D rememberis used almost exclusively of historical facts, e.g. Deuteronomy 5:15; Deuteronomy 7:18; Deuteronomy 8:2; Deuteronomy 9:7; Deuteronomy 15:15; Deuteronomy 16:3; but once with God, the giver of wealth, as the object, Deuteronomy 8:18. Observeor keep, used of the feast of unleavened bread by E Exodus 23:15, by J Exodus 34:18; the Sabbath by P Exodus 31:13 f., Exodus 31:16; Leviticus 19:3; Leviticus 19:30; Leviticus 26:2 (H); the month Abib by D Deuteronomy 16:1. In Psalms 103:18 keepHis covenant and rememberHis precepts are parallel.

as the Lord thy God commanded thee not in Exodus 20:8; cf. Deuteronomy 5:16, here and there a needless expansion, for it cannot refer to some previous institution of the Sabbath.