Deuteronomy 25:15

15 You must have accurate and honest weights and measures, so that you may live long in the land the LORD your God is giving you.

Read Deuteronomy 25:15 Using Other Translations

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.
A full and fair weight you shall have, a full and fair measure you shall have, that your days may be long in the land that the LORD your God is giving you.
Yes, always use honest weights and measures, so that you may enjoy a long life in the land the LORD your God is giving you.