And Saul said unto the Kenites, Go, depart, get you down from among the Amalekites, lest I destroy you with them: for ye showed kindness to all the children of Israel, when they came up out of Egypt. So the Kenites departed from among the Amalekites.(1 Samuel 15:6)

And Saul smote the Amalekites from Havilah until thou comest to Shur, that is over against Egypt.(1 Samuel 15:7)

And he took Agag the king of the Amalekites alive, and utterly destroyed all the people with the edge of the sword.(1 Samuel 15:8)

But Saul and the people spared Agag, and the best of the sheep, and of the oxen, and of the fatlings, and the lambs, and all that was good, and would not utterly destroy them: but every thing that was vile and refuse, that they destroyed utterly.

Then came the word of the LORD unto Samuel, saying,(1 Samuel 15:10)

It repenteth me that I have set up Saul to be king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.(1 Samuel 15:11)

And when Samuel rose early to meet Saul in the morning, it was told Samuel, saying, Saul came to Carmel, and, behold, he set him up a place, and is gone about, and passed on, and gone down to Gilgal.(1 Samuel 15:12)

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1 Samuel 15:9 - Cross Reference

Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass. (1 Samuel 15:3)

When I saw among the spoils a goodly Babylonish garment, and two hundred shekels of silver, and a wedge of gold of fifty shekels weight, then I coveted them, and took them; and, behold, they are hid in the earth in the midst of my tent, and the silver under it. (Joshua 7:21)

And it was so, that when they that bare the ark of the LORD had gone six paces, he sacrificed oxen and fatlings. (2 Samuel 6:13)

And Saul said, They have brought them from the Amalekites: for the people spared the best of the sheep and of the oxen, to sacrifice unto the LORD thy God; and the rest we have utterly destroyed. (1 Samuel 15:15)

Wherefore then didst thou not obey the voice of the LORD, but didst fly upon the spoil, and didst evil in the sight of the LORD? (1 Samuel 15:19)