2 Samuel 7:15,16 - Joseph Benson’s Commentary on the Old and New Testaments

My mercy shall not depart from him Or, my kindness, as the Hebrew word חסדי, chasdi, rather means. That is, the kingdom which I have mercifully and kindly promised to thee and thine. As I took it from Saul In regard of his posterity, for the kingdom was continued to Saul himself during his life. Thy kingdom shall be established for ever before thee Thine eyes, in some sort, beholding it; for he lived to see his wise son Solomon actually placed on the throne with reputation and general applause, which was in itself a good presage of the continuance of the kingdom in his family; and, when considered in connection with God's infallible promises made to him and his descendants, must have given him assurance thereof. David, however, had his eyes and thoughts on the Messiah, Psalms 110:1; whose day he saw by faith, as Abraham had done; whom he knew God would raise up of the fruit of his loins to sit on his throne, Acts 2:30, and the eternity of whose kingdom might well be said to be before him. Thy throne shall be established for ever The kingdom shall be continued for a long time, even for many ages, in thy family, and in the Messiah, who is to be thy seed, to all eternity. Thus the angel, applying this promise to Jesus, says to Mary, The Lord God shall give unto him the throne of HIS FATHER DAVID. And he shall reign over the house of Jacob FOR EVER, and of HIS KINGDOM there shall be NO END.