Deuteronomy 25:15

12 Then thou shalt cut off her hand, thine eye shall not pity her.

13 Thou shalt not have in thy bag divers weights, a great and a small.

14 Thou shalt not have in thine house divers measures, a great and a small.

15 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.

16 For all that do such things, and all that do unrighteously, are an abomination unto the LORD thy God.

17 Remember what Amalek did unto thee by the way, when ye were come forth out of Egypt;

18 How he met thee by the way, and smote the hindmost of thee, even all that were feeble behind thee, when thou wast faint and weary; and he feared not God.