John Gills Exposition of the Bible Commentary - Deuteronomy 25:13
Thou shalt not have in thy bag divers weights ,.... Or, "a stone and a stone" F25 אבן ואבן "lapis et lapis", Montanus, Vatablus, Piscator. ; it being usual, in those times and countries, to have their weights of stone, as it was formerly with us here; we still say, that such a commodity is worth so much per stone, a stone being of such a weight; now these were not to be different: a great and a small ; great weights, to buy with them, and small weights, to sell with them, as... read more
Matthew Henry's Complete Commentary - Deuteronomy 25:13-19
Here is, I. A law against deceitful weights and measures: they must not only not use them, but they must not have them, not have them in the bag, not have them in the house (Deut. 25:13, 14); for, if they had them, they would be strongly tempted to use them. They must not have a great weight and measure to buy by and a small one to sell by, for that was to cheat both ways, when either was bad enough; as we read of those that made the ephah small, in which they measured the corn they sold, and... read more