1 Kings 8:25

“ Now therefore, O YHWH, the God of Israel, keep with your servant David my father what you have promised him, saying, “There shall not fail you a man in my sight to sit on the throne of Israel, if only your children take heed to their way, to walk before me as you have walked before me.”

Solomon then reminded YHWH of the promise that he had made to his father David (1 Kings 2:4), “There shall not fail you a man in my sight to sit on the throne of Israel, if only your children take heed to their way, to walk before me as you have walked before me.” And he called on YHWH to keep with David his father what He had promised him concerning the continuance of his house on the throne of Israel. Note the thought that in some way David was still in a position where the promise could be kept with him. It was therefore being suggested that he had some kind of continuance after death (compare Jesus' argument in Matthew 22:31). What Solomon would, of course, sadly overlook was that the promises only applied if David's sons walked before YHWH as David had. But that was something still in the future and not in his purview. He did not doubt his own heart at this moment. Fortunately the promise in 2 Samuel 7:4 was absolute and was not dependent on the obedience of David's sons (which would produce chastisement but not rejection) but on the dependability of YHWH.

For there shall not fail you a man to sit on your throne' and ‘take heed to their way' compare 1 Kings 2:4,