1 Samuel 16:2-7

And Samuel said, How can I go? if Saul hear it, he will kill me. And Jehovah said, Take a heifer with thee, and say, I am come to sacrifice to Jehovah. And call Jesse to the sacrifice, and I will show thee what thou shalt do: and thou shalt anoint unto me him whom I name unto thee. And Samuel did that which Jehovah spake, and came to Beth-lehem. And the elders of the city came to meet him trembling, and said, Comest thou peaceably? And he said, Peaceably; I am come to sacrifice unto Jehovah: sanctify yourselves, and come with me to the sacrifice. And he sanctified Jesse and his sons, and called them to the sacrifice. And it came to pass, when they were come, that he looked on Eliab, and said, Surely Jehovah’s anointed is before him. But Jehovah said unto Samuel, Look not on his countenance, or on the height of his stature; because I have rejected him: for Jehovah seeth not as man seeth; for man looketh on the outward appearance, but Jehovah looketh on the heart.