16 “Now, LORD, the God of Israel, keep for your servant David my father the promises you made to him when you said, ‘You shall never fail to have a successor to sit before me on the throne of Israel, if only your descendants are careful in all they do to walk before me according to my law, as you have done.’

Read 2 Chronicles 6:16 Using Other Translations

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.
Now therefore, O LORD, God of Israel, keep for your servant David my father what you have promised him, saying, 'You shall not lack a man to sit before me on the throne of Israel, if only your sons pay close attention to their way, to walk in my law as you have walked before me.'
“And now, O LORD, God of Israel, carry out the additional promise you made to your servant David, my father. For you said to him, ‘If your descendants guard their behavior and faithfully follow my Law as you have done, one of them will always sit on the throne of Israel.’