1 Samuel 15:3-9

3Now go and strike Amalek and adevote to destruction
That is, set apart ( devote) as an offering to the Lord (for destruction); also verses 8, 9, 15, 18, 20, 21
all that they have. Do not spare them, cbut kill both man and woman, child and infant, ox and sheep, camel and donkey.’”

4So Saul summoned the people and numbered them in Telaim, two hundred thousand men on foot, and ten thousand men of Judah. 5And Saul came to the city of Amalek and lay in wait in the valley. 6Then Saul said to dthe Kenites, “Go, depart; go down from among the Amalekites, lest I destroy you with them. eFor you showed kindness to all the people of Israel when they came up out of Egypt.” So the Kenites departed from among the Amalekites. 7 fAnd Saul defeated the Amalekites from gHavilah as far as hShur, which is east of Egypt. 8And he took Agag the king of the Amalekites alive iand devoted to destruction all the people with the edge of the sword. 9 jBut Saul and the people spared Agag and the best of the sheep and of the oxen and of the fattened calves
The meaning of the Hebrew term is uncertain
and the lambs, and all that was good, and would not utterly destroy them. All that was despised and worthless they devoted to destruction.

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