1 Samuel 16:2-6

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

And you shall invite Jesse to the sacrifice, and I will let you know what you shall do; and you shall anoint for Me the one whom I designate to you.”

So Samuel did what the Lord told him, and he came to Bethlehem. Then the elders of the city came trembling to meet him and said, “Do you come in peace?”

And he said, “In peace; I have come to sacrifice to the Lord. Consecrate yourselves and come with me to the sacrifice.” He also consecrated Jesse and his sons and invited them to the sacrifice.

When they entered, he looked at Eliab and thought, “Surely the Lord’s anointed is standing before Him.”