2 Kings 8:19
"Yet the LORD would not destroy Judah for David his servant’s sake, as he promised him to give him alway a light, and to his children."
Cross References (ranked by relevance)
And unto his son will I give one tribe, that David my servant may have a light alway before me in Jerusalem, the city which I have chosen me to put my name there.
For I will defend this city to save it for mine own sake, and for my servant David’s sake.
But my mercy shall not depart away from him, as I took it from Saul, whom I put away before thee.
I will not execute the fierceness of mine anger, I will not return to destroy Ephraim: for I am God, and not man; the Holy One in the midst of thee: and I will not enter into the city.
For I will defend this city, to save it, for mine own sake, and for my servant David’s sake.
Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
Howbeit the LORD would not destroy the house of David, because of the covenant that he had made with David, and as he promised to give a light to him and to his sons for ever.
But Abishai the son of Zeruiah succoured him, and smote the Philistine, and killed him. Then the men of David sware unto him, saying, Thou shalt go no more out with us to battle, that thou quench not the light of Israel.