1 Samuel 15:10

8He took Agag the king of the Amalekites alive, and utterly destroyed all the people with the edge of the sword.

9But Saul and the people spared Agag and the best of the sheep, of the cattle, of the fat calves, of the lambs, and all that was good, and were not willing to utterly destroy them; but everything that was vile and refuse, that they destroyed utterly.

10Then the LORD’s word came to Samuel, saying,

11“It grieves me that I have set up Saul to be king, for he has turned back from following me, and has not performed my commandments.” Samuel was angry; and he cried to the LORD all night.

12Samuel rose early to meet Saul in the morning; and Samuel was told, saying, “Saul came to Carmel, and behold, he set up a monument for himself, turned, passed on, and went down to Gilgal.”