Saul said to the Kenites, Go, depart, get you down from among the Amalekites, lest I destroy you with them; for you shown kindness to all the children of Israel, when they came up out of Egypt. So the Kenites departed from among 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intended as irrevocable, as in the rejection of Saul, then, says our text, there is no possibility of that decree being rescinded (cf.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.] 