Deuteronomy 25:13-19

13“You shall not have in your bag differing weights, a heavy and a light.

14You shall not have in your house differing measures, a large and a small.

15You shall have a perfect and just weight, a perfect and just measure, that your days may be lengthened in the land which the Lord your God is giving you.

16For all who do such things, all who behave unrighteously, are an abomination to the Lord your God.

17“Remember what Amalek did to you on the way as you were coming out of Egypt,

18how he met you on the way and attacked your rear ranks, all the stragglers at your rear, when you were tired and weary; and he did not fear God.

19Therefore it shall be, when the Lord your God has given you rest from your enemies all around, in the land which the Lord your God is giving you to possess as an inheritance, that you will blot out the remembrance of Amalek from under heaven. You shall not forget.