1 Samuel 16:13

13 Then Samuel took the horn of oil, and anointed him in the presence of his brothers; and the spirit of the Lord came mightily upon David from that day forward. Samuel then set out and went to Ramah.

1 Samuel 16:13 In-Context

11 Samuel said to Jesse, "Are all your sons here?" And he said, "There remains yet the youngest, but he is keeping the sheep." And Samuel said to Jesse, "Send and bring him; for we will not sit down until he comes here."
12 He sent and brought him in. Now he was ruddy, and had beautiful eyes, and was handsome. The Lord said, "Rise and anoint him; for this is the one."
13 Then Samuel took the horn of oil, and anointed him in the presence of his brothers; and the spirit of the Lord came mightily upon David from that day forward. Samuel then set out and went to Ramah.
14 Now the spirit of the Lord departed from Saul, and an evil spirit from the Lord tormented him.
15 And Saul's servants said to him, "See now, an evil spirit from God is tormenting you.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.