Proverbs 20:10

If there were two persons to be judged, one being given more consideration and the other less consideration, with a judge standing between both and making them equal by depriving only the one who has more than enough, the judge can be said to have failed to the extent that the adjudged party is injured. He who does not first have true justice instilled in his soul, but is corrupted by money or favors his friends or seeks vengeance against his enemies or reveres power, is unable to effect justice.… For rectitude in judgment is evidence that someone's soul is well disposed toward equity and law. Hence, it prohibits this in what follows, saying, "Large weights and small weights are abominable before God," with inequality in judgment being indicated in Proverbs under the title of weights.

And the giver of the law similarly forbids the same thing, saying: "Let the balance be just and the weights equal, the bushel just and the sextarius equal," and Solomon also gives a like opinion on this matter: "Great and small weights and double measures are both unclean before the Lord, and one who uses them shall be hindered in his contrivances." Further not only in the way in which we have said, but also in this must we strive not to have unfair weights in our hearts, nor double measures in the storehouse of our conscience, i.e., not to overwhelm those, to whom we are to preach the word of the Lord, with precepts that are too strict and heavier than we ourselves can bear, while we take for granted that for ourselves those things which have to do with the rule of strictness are to be softened by a freer allowance of relaxation. For when we do this, what is it but to weigh and measure the goods and fruits of the Lord's commands in a double weight and measure? For if we dispense them in one way to ourselves and in another to our brethren, we are rightly blamed by the Lord because we have unfair balances and double measures, in accordance with the saying of Solomon which tells us that "A double weight is an abomination to the Lord, and a deceitful balance is not good in His sight." In this way also we plainly incur the guilt of using a deceitful weight and a double measure, if out of the desire for the praise of men, we make a show before the brethren of greater strictness than what we practice in private in our own cells, trying to appear more abstinent and holier in the sight of men than in the sight of God, an evil which we should not only avoid but actually loathe.

He who commands must always keep to the exact scope of the commandments, and he who distributes tasks must observe equity in looking into them, for "a false balance is an abomination to the Lord." There is, then, an excess and a defect in weight, but the church acccepts neither, for "excessive and defective weights and diverse measures, both of them are alike abominable in the sight of the Lord."

Diverse weights, diverse measures, etc. For a man with diverse weights in his house has different measures, that is he measures differently for himself and for his neighbor, who always seeks in his own deeds what can be praised, but in others' deeds what can …

Divers weights, and divers measures,.... Or, "a stone and a stone, and an ephah and an ephah" (d).