Saul said to Samuel, Yes, I have obeyed the voice of Yahweh, and have gone the way which Yahweh sent me, and have brought Agag the king of Amalek, and have utterly destroyed the Amalekites.
"When God issues a decree that is plainly intended as irrevocable, as in the rejection of Saul, then, says our text, there is no possibility of that decree being rescinded (cf. Numbers 23:19)." [Note: Gordon, p. 146.] 