John Gill Commentary 1 Kings 8:59

"And let these my words, wherewith I have made supplication before Jehovah, be nigh unto Jehovah our God day and night, that he maintain the cause of his servant, and the cause of his people Israel, as every day shall require;" — 1 Kings 8:59 (ASV)

And let these my words, wherewith I have made supplication
before the Lord
At this time:

be nigh unto the Lord our God day and night ;
be continually remembered and regarded by him, that so gracious answers might always be returned to those who supplicated in this place:

that he maintain the cause of his servant ;
of himself and his successors in the throne, that they may continue to possess it in peace, to the glory of God, and the good of the people:

and the cause of his people Israel at all times :
that their rights and privileges might be continued, and they supported in them; and both his cause and theirs be regarded:

as the matter shall require ;
as they should stand in need of assistance, direction, and protection.