1 Samuel 15:2

I remember — Now I will revenge those old injuries of the Amalekites on their children: who continue in their parents practices. Came from Egypt — When he was newly come out of cruel and long bondage, and was now weak, and weary, and faint, and hungry, Deuteronomy 25:18, and therefore it was barbarous instead of that pity which even Nature prompted them to afford, to add affliction to the afflicted; it was also horrid impiety to fight against God himself and to lift up their hand in a manner against the Lord's throne, whilst they struck at that people which God had brought forth in so stupendous a way.