1 Samuel 16:10-13

In this way Jesse brought seven of his sons to Samuel. And Samuel said to him, “No, the LORD hasn't chosen any of these.” Then he asked him, “Do you have any more sons?” Jesse answered, “There is still the youngest, but he is out taking care of the sheep.” “Tell him to come here,” Samuel said. “We won't offer the sacrifice until he comes.” So Jesse sent for him. He was a handsome, healthy young man, and his eyes sparkled. The LORD said to Samuel, “This is the one—anoint him!” Samuel took the olive oil and anointed David in front of his brothers. Immediately the spirit of the LORD took control of David and was with him from that day on. Then Samuel returned to Ramah.