1 Samuel 15:2
"Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt."
Cross References (ranked by relevance)
Numbers 24:20
11
And when he looked on Amalek, he took up his parable, and said, Amalek was the first of the nations; but his latter end shall be that he perish for ever.
Hosea 7:2
And they consider not in their hearts that I remember all their wickedness: now their own doings have beset them about; they are before my face.
Amos 8:7
The LORD hath sworn by the excellency of Jacob, Surely I will never forget any of their works.