Deuteronomy 25:13-16

13Thou shalt not have in thy bag differing weights, a great and a small.1 14Thou shalt not have in thy house differing measures, a great and a small.2 15But thou shalt have a perfect and just weight, a perfect and just measure shalt thou have: that thy days may be lengthened in the land which the LORD thy God giveth thee. 16For all that do such things, and all that do unrighteously, are an abomination to the LORD thy God.