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.
Saul’s lack of submission was an even more serious sin than David’s sins of murder and adultery. God did not remove the kingship from David for his sins, but He did from Saul.