In a book; even in this book, which Moses was to write by God’s inspiration and appointment. See Exo_34:27Deu_31:9,22. In the ears of Joshua, thy successor, and the captain of my people, that he and all succeeding governors may watch all occasions to execute this command.
I will utterly put out the remembrance of Amalek, i.e. I will utterly destroy them; for a person or people dead or destroyed are soon forgotten, Psa_31:12, and the grave is called the land of forgetfulness, Psa_88:12. Or thus, Though they are now a numerous and flourishing people, and in great repute, I will make them few and inglorious, for such are little minded or remembered; for this is not to be understood absolutely of a speedy and utter extinction of them, for he supposeth their being from generation to generation, Exo_17:16, but comparatively. From under heaven; from the face of the whole earth.