1 Kings 1:33-35

33 The king also said to them, Take with you the servants of your lord, and cause Solomon my son to ride on my own mule, and bring him down to Gihon:

34 And let Zadok the priest and Nathan the prophet anoint him there king over Israel: and blow you with the trumpet, and say, God save king Solomon.

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