Deuteronomy 4:2
Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.
Deuteronomy 15:2
And this is the manner of the release: Every creditor that lendeth ought unto his neighbor shall release it; he shall not exact it of his neighbor, or of his brother; because it is called the LORD's release.
Deuteronomy 26:14
I have not eaten thereof in my mourning, neither have I taken away ought thereof for any unclean use, nor given ought thereof for the dead: but I have hearkened to the voice of the LORD my God, and have done according to all that thou hast commanded me.