1 Kings 1:30

Even as I sware unto thee by the Lord God of Israel,.... And so owns and confirms the truth of what Nathan had suggested to Bathsheba, and she had asserted, 1 Kings 1:13;

saying, assuredly Solomon thy son shall reign after me, and he shall sit upon my throne in my stead; this was the substance of the oath:

even so will I certainly do this day; perform this oath, and set Solomon on the throne.