1 Kings 1:38-39

So Zadok the priest, Nathan the prophet, Benaiah the son of Jehoiada, the Cherethites, and the Pelethites [the king’s bodyguards] went down [from Jerusalem] and had Solomon ride on King David’s mule, and brought him to [the spring at] Gihon. 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!”