1 Kings 1:28-30
King David: 28 Tell Bathsheba to come here.
So Bathsheba entered the king’s chambers and stood in front of him.
King David (swearing): 29 As certain as the life of the Eternal One, the One who rescued me from all trouble, 30 today I will uphold what I promised to you by the Eternal, the God of Israel, when I said, “Your son, Solomon, will reign as king after me. He will inherit my throne.”