1 Samuel 16:2-3

2Samuel said, ‘If I go to do that, people will tell Saul about it. Then he will kill me.’ The Lord said, ‘Take a calf with you. Tell the people that you have come to offer a sacrifice to the Lord.

3Then ask Jesse to come to the sacrifice. I will show you what to do after that. I will show you the person that you must anoint with the oil.’