[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.
BSB
You must maintain accurate and honest weights and measures, so that you may live long in the land that the LORD your God is giving you.
WEB
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 Yahweh your God gives you.
YLT
Thou hast a stone complete and just, thou hast an ephah complete and just, so that they prolong thy days on the ground which Jehovah thy God is giving to thee;