John Gill Commentary Deuteronomy 8:11

"Beware lest thou forget Jehovah thy God, in not keeping his commandments, and his ordinances, and his statutes, which I command thee this day:" — Deuteronomy 8:11 (ASV)

Beware that you forget not the Lord your God
The Father of mercies and fountain of goodness, the author and donor of every good and perfect gift. Plenty is apt to induce a forgetfulness of God, when on the contrary one would think it should keep him in continual remembrance, and engage to daily thankfulness to him:

in not keeping his commandments, and his judgments, and his statutes,
which I command you this day ;
gave a repetition of, and in the name of God afresh enjoined them, even laws moral, ceremonial, and judicial, which, when not observed, God is forgotten.