2 Thus said the Lord of hosts, Now will I take vengeance for what Amalek did to Israel, when he met him in the way as he came up out of Egypt.
1 Samuel 15:2 Cross References - CAB
Exodus 17:8-16
8 And Amalek came and fought with Israel in Rephidim.
9 And Moses said to Joshua, Choose out for yourself mighty men, and go forth and set the army in array against Amalek tomorrow; and behold, I shall stand on the top of the hill, and the rod of God will be in my hand.
10 And Joshua did as Moses said to him, and he went out and set the army in array against Amalek, and Moses and Aaron and Hur went up to the top of the hill.
11 And it came to pass, when Moses lifted up his hands, Israel prevailed; and when he let down his hands, Amalek prevailed.
12 But the hands of Moses were heavy, and they took a stone and put it under him, and he sat upon it; and Aaron and Hur supported his hands, one on this side and the other on that, and the hands of Moses were supported till the going down of the sun.
13 And Joshua routed Amalek and all his people with the edge of the sword.
14 And the Lord said to Moses, Write this for a memorial in a book, and speak in the ears of Joshua; for I will utterly blot out the memorial of Amalek from under heaven.
15 And Moses built an altar to the Lord, and called the name of it, The Lord my Refuge.
16 For with a secret hand the Lord wages war upon Amalek to all generations.
Numbers 24:20
20 And having seen Amalek, he took up his parable and said, Amalek is the first of the nations; yet his seed shall perish.
Deuteronomy 25:17-19
17 Remember what things Amalek did to you by the way, when you went forth out of the land of Egypt,
18 how he withstood you in the way, and harassed your rear, even those that were weary behind you, and you hungered and were weary; and he did not fear God.
19 And it shall come to pass whenever the Lord your God shall have given you rest from all your enemies round about you, in the land which the Lord your God gives you to inherit, you shall blot out the name of Amalek from under heaven, and shall not forget to do it.
Jeremiah 31:34
34 And no more shall every man teach his neighbor, and every man his brother, saying, Know the Lord. For all shall know Me, from the least of them to the greatest of them. For I will be merciful to their iniquities, and their sins I will remember no more.
Hosea 7:2
2 that they may concert together as men singing in their heart. I remember all their wickedness; now have their own counsels compassed them about; they came before My face.
Amos 8:7
7 The Lord swears against the pride of Jacob, None of your works shall ever be forgotten.