1 Samuel 10:9

‘Now this will be the sign to you which will come concerning your two sons, Hophni and Phinehas: on the same day both of them will be put to death.

‘But I will raise up for Myself a faithful priest who will do according to what is in My heart and in My soul; and I will build him a faithful house, and he will walk before My anointed always.

Then Samuel took the horn of oil and anointed him in the midst of his brothers; and the Spirit of Yahweh came mightily upon David from that day forward. And Samuel arose and went to Ramah.