Deuteronomy 25:16-19

For all who do such things, all who act dishonestly, are an abomination to the LORD your God. “Remember what Amalek did to you on the way as you came out of Egypt, how he attacked you on the way when you were faint and weary, and cut off your tail, those who were lagging behind you, and he did not fear God. Therefore when the LORD your God has given you rest from all your enemies around you, in the land that the LORD your God is giving you for an inheritance to possess, you shall blot out the memory of Amalek from under heaven; you shall not forget.