1 Samuel 16:1-6 King James Version (KJV)
16 And the Lord said unto Samuel, How long wilt thou mourn for Saul, seeing I have rejected him from reigning over Israel? fill thine horn with oil, and go, I will send thee to Jesse the Bethlehemite: for I have provided me a king among his sons.
2 And Samuel said, How can I go? if Saul hear it, he will kill me. And the Lord said, Take an heifer with thee, and say, I am come to sacrifice to the Lord.
3 And call Jesse to the sacrifice, and I will shew thee what thou shalt do: and thou shalt anoint unto me him whom I name unto thee.
4 And Samuel did that which the Lord spake, and came to Bethlehem. And the elders of the town trembled at his coming, and said, Comest thou peaceably?
5 And he said, Peaceably: I am come to sacrifice unto the Lord: sanctify yourselves, and come with me to the sacrifice. And he sanctified Jesse and his sons, and called them to the sacrifice.
6 And it came to pass, when they were come, that he looked on Eliab, and said, Surely the Lord's anointed is before him.