'Horn' in the Bible

Hannah prayed and said,“My heart rejoices and triumphs in the Lord;My horn (strength) is lifted up in the Lord,My mouth has opened wide [to speak boldly] against my enemies,Because I rejoice in Your salvation.

The Lord said to Samuel, “How long will you grieve for Saul, when I have rejected him as king over Israel? Fill your horn with oil and go; I will send you to Jesse the Bethlehemite, for I have chosen a king for Myself among his sons.”

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