1 Kings 1:32-35

32And king David said, Call me Zadok the priest, and Nathan the prophet, and Benaiah the son of Jehoiada. And they came before the king.

33And the king said to them, Take with you the servants of your lord, and cause Solomon my son to ride upon mine own mule, and bring him down to Gihon;

34and let Zadok the priest and Nathan the prophet anoint him there king over Israel; and blow ye with the trumpet, and say, Long live king Solomon!

35And ye shall come up after him, that he may come and sit on my throne; for he shall reign in my stead, and I have appointed him to be ruler over Israel and over Judah.