Deuteronomy 25:19
When the LORD your God gives you rest from the enemies around you in the land that He is giving you to possess as an inheritance, you are to blot out the memory of Amalek from under heaven. Do not forget!
What it says
Once the Lord gives Israel rest in the land, they are to blot out Amalek's memory and not forget.
What it is doing
It turns remembered injury into a commanded future act.
In context
17Remember what the Amalekites did to you along your way from Egypt, 18how they met you on your journey when you were tired and weary, and they attacked all your stragglers; they had no fear of God. 19When the LORD your God gives you rest from the enemies around you in the land that He is giving you to possess as an inheritance, you are to blot out the memory of Amalek from under heaven. Do not forget!