David said, This is the house of the Lord - Till a temple is built for his name, this place shall be considered the temple of God; and on this altar, and not on that at Gibeon, shall the burnt-offerings of Israel be made. David probably thought that this was the place on which God designed that his house should be built; and perhaps it was this that induced him to buy, not only the threshing-floor, but probably some adjacent ground also, as Calmet supposes, that there might be sufficient room for such a building.

This is the house. David perhaps had some assurance that this was the place on which God designed that His house should be built; and perhaps it was this that induced him to buy not only the threshing floor, put probably some adjacent ground also, as Calmet supposes, that there might be sufficient room for such a structure.

1 Chronicles 21:18-28 Then the angel of the LORD commanded Gad to say to David, that David should go up...

Genesis 28:17 And he was afraid, and said, How dreadful is this place! this is none other but the house of God, and this is the gate of heaven.

Deuteronomy 12:5-7,11 But to the place which the LORD your God shall choose out of all your tribes to put his name there...

2 Samuel 24:18 And Gad came that day to David, and said to him, Go up, raise an altar to the LORD in the threshing floor of Araunah the Jebusite.

2 Chronicles 3:1 Then Solomon began to build the house of the LORD at Jerusalem in mount Moriah, where the Lord appeared to David his father...

2 Chronicles 6:5,6 Since the day that I brought forth my people out of the land of Egypt I chose no city among all the tribes of Israel to build an house in...

Psalm 78:60,67-69 So that he forsook the tabernacle of Shiloh, the tent which he placed among men...

Psalm 132:13,14 For the LORD has chosen Zion; he has desired it for his habitation...

John 4:20-22 Our fathers worshipped in this mountain; and you say, that in Jerusalem is the place where men ought to worship...

and this is the altar

2 Kings 18:22 But if you say to me, We trust in the LORD our God: is not that he, whose high places and whose altars Hezekiah has taken away...

2 Chronicles 32:12 Has not the same Hezekiah taken away his high places and his altars, and commanded Judah and Jerusalem, saying...

The Promise in 2 Samuel, Chap. vii.
The Messianic prophecy, as we have seen, began at a time long anterior to that of David. Even in Genesis, we perceived [Pg 131] it, increasing more and more in distinctness. There is at first only the general promise that the seed of the woman should obtain the victory over the kingdom of the evil one;--then, that the salvation should come through the descendants of Shem;--then, from among them Abraham is marked out,--of his sons, Isaac,--from among his sons, Jacob,--and from among the twelve sons …
Ernst Wilhelm Hengstenberg—Christology of the Old Testament