And now, O Lord God, thou art that God,.... Who is the Lord of hosts, and the God of Israel, that has promised and is able to perform, and is faithful to his promise:

and thy words be true; are truly, punctually, and faithfully performed, never fail:

and thou hast promised this goodness unto thy servant; concerning building and establishing his house. David repeats this promise as being greatly affected with it, and fully assured of the performance of it.

David then briefly sums up the two parts of his prayer of thanksgiving in the two clauses commencing with ועתּה, "and now." - In 2 Samuel 7:28 he sums up the contents of 2 Samuel 7:18-24 by celebrating the greatness of the Lord and His promise; and in 2 Samuel 7:29 the substance of the prayer in 2 Samuel 7:25-27. וּברך הואל, may it please Thee to bless (הואיל; see at Deuteronomy 1:5). "And from (out of) Thy blessing may the house of Thy servant be blessed for ever."

And now, O Lord GOD, thou art that God, and thy words be true, and thou hast promised this goodness unto thy servant:

7:28 That God - That God who hast declared thyself to be Israel's God, and in particular my God.

7:18-29 David's prayer is full of the breathings of devout affection toward God. He had low thoughts of his own merits. All we have, must be looked upon as Divine gifts. He speaks very highly and honourably of the Lord's favours to him. Considering what the character and condition of man is, we may be amazed that God should deal with him as he does. The promise of Christ includes all; if the Lord God be ours, what more can we ask, or think of? Eph 3:20. He knows us better than we know ourselves; therefore let us be satisfied with what he has done for us. What can we say more for ourselves in our prayers, than God has said for us in his promises? David ascribes all to the free grace of God. Both the great things He had done for him, and the great things He had made known to him. All was for his word's sake, that is, for the sake of Christ the eternal Word. Many, when they go to pray, have their hearts to seek, but David's heart was found, that is, it was fixed; gathered in from its wanderings, entirely engaged to the duty, and employed in it. That prayer which is from the tongue only, will not please God; it must be found in the heart; that must be lifted up and poured out before God. He builds his faith, and hopes to speed, upon the sureness of God's promise. David prays for the performance of the promise. With God, saying and doing are not two things, as they often are with men; God will do as he hath said. The promises of God are not made to us by name, as to David, but they belong to all who believe in Jesus Christ, and plead them in his name.