1 Samuel 16:1-3

Now the LORD said to Samuel, “You have mourned long enough for Saul. I have rejected him as king of Israel, so fill your flask with olive oil and go to Bethlehem. Find a man named Jesse who lives there, for I have selected one of his sons to be my king.” But Samuel asked, “How can I do that? If Saul hears about it, he will kill me.” “Take a heifer with you,” the LORD replied, “and say that you have come to make a sacrifice to the LORD. Invite Jesse to the sacrifice, and I will show you which of his sons to anoint for me.”