Deuteronomy 25:19

19 When the LORD your God gives you rest from all the enemies around you in the land he is giving you to possess as an inheritance, you shall blot out the name of Amalek from under heaven. Do not forget!

Read Deuteronomy 25:19 Using Other Translations

Therefore it shall be, when the LORD thy God hath given thee rest from all thine enemies round about, in the land which the LORD thy God giveth thee for an inheritance to possess it, that thou shalt blot out the remembrance of Amalek from under heaven; thou shalt not forget it.
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.
Therefore, when the LORD your God has given you rest from all your enemies in the land he is giving you as a special possession, you must destroy the Amalekites and erase their memory from under heaven. Never forget this!