1 Samuel 16:1, 11

And Jehovah said unto Samuel, How long wilt thou mourn for Saul, seeing I have rejected him from being king over Israel? fill thy horn with oil, and go: I will send thee to Jesse the Beth-lehemite; for I have provided me a king among his sons.

And Samuel said unto Jesse, Are here all thy children? And he said, There remaineth yet the youngest, and, behold, he is keeping the sheep. And Samuel said unto Jesse, Send and fetch him; for we will not sit down till he come hither.