John Gill Commentary Deuteronomy 17:2

"If there be found in the midst of thee, within any of thy gates which Jehovah thy God giveth thee, man or woman, that doeth that which is evil in the sight of Jehovah thy God, in transgressing his covenant," — Deuteronomy 17:2 (ASV)

If there be found among you, within any of your gates which the
Lord your God gives you
In any of their cities in the land of Canaan:

man or woman that has wrought wickedness in the sight of the Lord your
God :
as all that is wrought is in the sight of the omniscient God; here it means not any kind of wickedness, for there is none lives without committing sin of one sort or another, all which is known to God the searcher of hearts, but such wickedness as is after described:

in transgressing his covenant ;
that is, his law, and particularly the first table of it, which respects divine worship, and which is in the nature of a marriage contract or covenant; which, as that is transgressed by adultery committed by either party, so the covenant between God and Israel was transgressed by idolatry, which is spiritual adultery, and going a whoring after other gods, as it follows: