Deuteronomy 25:13-16

Thou shalt not have in thy bag divers weights, a great and a small. Thou shalt not have in thine house divers measures, a great and a small. But 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. For all that do such things, and all that do unrighteously, are an abomination unto the LORD thy God.