1 Kings 1:11-14

11So Nathan spoke to Bathsheba the mother of Solomon, saying, “Have you not heard that Adonijah the son of Haggith has become king, and David our lord does not know it?

12Come, please, let me now give you advice, that you may save your own life and the life of your son Solomon.

13Go immediately to King David and say to him, ‘Did you not, my lord, O king, swear to your maidservant, saying, “Assuredly your son Solomon shall reign after me, and he shall sit on my throne“? Why then has Adonijah become king?’

14Then, while you are still talking there with the king, I also will come in after you and confirm your words.”