Saul said, “They have brought them from the Amalekites, for the people spared the best of the sheep and of the oxen to sacrifice to the LORD your God, and the rest we have devoted to destruction.”
God does not change His mind as we do; He wills an alteration in His method when the creature turns away. Saul turned back from following Him through covetousness and partial obedience, and made himself God's enemy. Samuel spent the whole night wrestling with God in prayer for Saul's restoration, grieving not for himself but that any sinner should forfeit God's favor.
AI summary
Commenting on 1 Samuel 15:10-23
And Saul said, they have brought them from the Amalekites,.... That is, the people, laying the blame upon them, as Adam did on his wife, as if he had no concern at all in it, when it is clear from Sa1 15:9 he was the principal one; nor is it probable the people should do this of themselves, without his consent and authority, which was...
The people spared the best of the sheep - It is very likely that the people did spare the best of the prey; and it is as likely that Saul might have restrained them if he would. That they might not love war, God had interdicted spoil and plunder, so the war was undertaken merely from a sense of duty, without any hope of enriching themselves by it.