1 Samuel 16:1; 1 Samuel 16:2

1 The LORD said to Samuel, “How long will you mourn for Saul, since I have rejected him as king over Israel? Fill your horn with oil and be on your way; I am sending you to Jesse of Bethlehem. I have chosen one of his sons to be king.”

2 But Samuel said, “How can I go? If Saul hears about it, he will kill me.” The LORD said, “Take a heifer with you and say, ‘I have come to sacrifice to the LORD.’