And he warned the Kenites, “Since you showed kindness to all the Israelites when they came up out of Egypt, go on and get away from the Amalekites. Otherwise I will sweep you away with them.”
Saul tells the Kenites to leave the Amalekites because they showed kindness to Israel after the exodus.
It marks out a people to be spared from Amalek's judgment.
1Then Samuel said to Saul, “The LORD sent me to anoint you king over His people Israel. Now therefore, listen to the words of the LORD. 2This is what the LORD of Hosts says: ‘I witnessed what the Amalekites did to the Israelites when they opposed them on their way up from Egypt. 3Now go and attack the Amalekites and devote to destruction all that belongs to them. Do not spare them, but put to death men and women, children and infants, oxen and sheep, camels and donkeys.’” 4So Saul summoned the troops and numbered them at Telaim — 200,000 foot soldiers and 10,000 men of Judah. 5Saul came to the city of Amalek and lay in wait in the valley. 6And he warned the Kenites, “Since you showed kindness to all the Israelites when they came up out of Egypt, go on and get away from the Amalekites. Otherwise I will sweep you away with them.” 7Then Saul struck down the Amalekites all the way from Havilah to Shur, which is east of Egypt. 8He captured Agag king of Amalek alive, but devoted all the others to destruction with the sword. 9Saul and his troops spared Agag, along with the best of the sheep and cattle, the fat calves and lambs, and the best of everything else. They were unwilling to devote them to destruction, but they devoted to destruction all that was despised and worthless.