Deuteronomy 25:13-18

13“You are not to have stones of different weights in your bag—large and small.

14You are not to have in your house ephahs of different measures—large and small.

15You must have a full and honest weight and a full and honest measure, so that your days may be long on the land that Adonai your God is giving you.

16For all who do these things, all who do injustice, are detestable to Adonai your God.

17“Remember what Amalek did to you along the way as you came out from Egypt—

18how he happened upon you along the way and attacked those among you in the rear, all the stragglers behind you, when you were tired and weary—he did not fear God.