Matthew Henry and continuators on Proverbs 20:23

23 Divers weights are an abomination unto the Lord ; and a false balance is not good.

This is to the same purport with what was said v. 20. 1. It is here repeated, because it is a sin that God doubly hates (as lying, which is of the same nature with this sin, is mentioned twice among the seven things that God hates, ch. vi. 17, 19), and because it was probably a sin very much practised at that time in Israel, and therefore made light of as if there were no harm in it, under pretence that, being commonly used, there was no trading without it. 2. It is here added, A false balance is not good, to intimate that it is not only abominable to God, but unprofitable to the sinner himself; there is really no good to be got by it, no, not a good bargain, for a bargain made by fraud will prove a losing bargain in the end.