A just balance and scales are according to Yahweh;
all the weights in the bag are his concern. Bible

“weights.” The Hebrew is literally “stones.” For most of history, the weights used by merchants for their scales were stones. Metal was too rare or expensive. The merchants most often had a sack of some kind to carry the stones in. Occasionally they would carry them, if their weight and number were small, in the folds of their garment.

Commentary for: Proverbs 16:11