1 Samuel 16:1-2, 6-7

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.” 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.’

When they arrived, Samuel saw Eliab and thought, “Surely the LORD’s anointed stands here before the LORD.” But the LORD said to Samuel, “Do not consider his appearance or his height, for I have rejected him. The LORD does not look at the things people look at. People look at the outward appearance, but the LORD looks at the heart.”