Deuteronomy 25:15 in the World English Bible
You shall have a perfect and just weight. You shall have a perfect and just measure, that your days may be long in the land which the LORD your God gives you.
Context
14 Thou shalt not have in thine house divers measures, a great and a small.
15 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.
16 For all that do such things, and all that do unrighteously, are an abomination unto the LORD thy God.