to sit. sitting.
yet so. if only. Same condition as 2 Samuel 7:14. Conditional to Solomon, but unconditional to David, as the Land was to Abraham (Genesis 15). Therefore the throne must, and will yet be, filled by David's son and David's Lord.
as. according as.
16 Now therefore, O LORD God of Israel, keep with thy servant David my father that which thou hast promised him, saying, There shall not fail thee a man in my sight to sit upon the throne of Israel; yet so that thy children take heed to their way to walk in my law, as thou hast walked before me.