[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.
Jewish Publication Society of America Version (JPS1917) - Deuteronomy 25:15 >A perfect and just weight shalt thou have; a perfect and just measure shalt thou have; that thy days may be long upon the land which the LORD thy God giveth thee.