Deuteronomy 25:13-18

13Thou shalt not have in thy bag diverse weights, a great and a small. 14Thou shalt not have in thy house diverse measures, a great and a small. 15A perfect and just weight shalt thou have; a perfect and just measure shalt thou have: that thy days may be long in the land which Jehovah thy God giveth thee. 16For all that do such things, even all that do unrighteously, are an abomination unto Jehovah thy God.

17Remember what Amalek did unto thee by the way as ye came forth out of Egypt; 18how he met thee by the way, and smote the hindmost of thee, all that were feeble behind thee, when thou wast faint and weary; and he feared not God.