'Horn of Oil' in the Bible

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.

Zadok the priest took a horn of [olive] oil from the [sacred] tent and anointed Solomon. They blew the trumpet, and all the people said, “Long live King Solomon!”