Horns were Used for Holding Oil

Now the LORD said to Samuel, “How long are you going to mourn for Saul, since I have rejected him as king over Israel? Fill your horn with oil and go. I am sending you to Jesse of Bethlehem, for I have selected from his sons a king for Myself.”

Zadok the priest took the horn of oil from the tabernacle and anointed Solomon. Then they blew the ram’s horn, and all the people proclaimed, “Long live King Solomon!”