Exodus 17:14 And the Lord said unto Moses, Write this for a memorial in a book, and rehearse it in the ears of Joshua: for I will utterly put out the remembrance of Amalek from under heaven.
[Patriarchs & Prophets pp 300] Concerning this wicked people the Lord declared, “The hand of Amalek is against the throne of Jehovah.” Exodus 17:16. The Amalekites were not ignorant of God's character or of His sovereignty, but instead of fearing before Him, they had set themselves to defy His power. The wonders wrought by Moses before the Egyptians were made a subject of mockery by the people of Amalek, and the fears of surrounding nations were ridiculed.
They had taken oath by their gods that they would destroy the Hebrews, so that not one should escape, and they boasted that Israel's God would be powerless to resist them. They had not been injured or threatened by the Israelites. Their assault was wholly unprovoked. It was to manifest their hatred and defiance of God that they sought to destroy His people. The Amalekites had long been high-handed sinners, and their crimes had cried to God for vengeance.
Yet His mercy had still called them to repentance; but when the men of Amalek fell upon the wearied and defenseless ranks of Israel, they sealed their nation's doom. The care of God is over the weakest of His children. No act of cruelty or oppression toward them is unmarked by Heaven. Over all who love and fear Him, His hand extends as a shield; let men beware that they smite not that hand; for it wields the sword of justice.
Exodus 17:15 And Moses built an altar, and called the name of it Jehovahnissi: 16 For he said, Because the Lord hath sworn that the Lord will have war with Amalek from generation to generation.
May God add His blessing to the study of His word. “Good night” and God bless!