1 Samuel 16:2-5

2And Samuel said, How can I go? if Saul shall hear it, he will kill me. And the LORD said, Take an heifer with thee, and say, I have come to sacrifice to the LORD.1 3And call Jesse to the sacrifice, and I will show thee what thou shalt do: and thou shalt anoint to me him whom I name to thee. 4And Samuel did that which the LORD spoke, and came to Bethlehem. And the elders of the town trembled at his coming, and said, Comest thou peaceably?2 5And he said, Peaceably: I have come to sacrifice to the LORD: sanctify yourselves, and come with me to the sacrifice. And he sanctified Jesse and his sons, and called them to the sacrifice.