But my mercy shall not depart away from him, as I took it from Saul, whom I put away before thee.

but my lovingkindness shall not depart from him, as I took it from Saul, whom I put away before thee.

But my mercy I will not take away from him, as I took it from Saul, whom I removed from before my face.

and My kindness doth not turn aside from him, as I turned it aside from Saul, whom I turned aside from before thee,

But my mercy will not be taken away from him, as I took it from him who was before you.

My mercy shall not depart - Hence, Isaiah's saying, the sure mercies of David Isaiah 55:3, i. e. unfailing, lasting mercies: mercies which are like streams of water that never dry up Isaiah 33:16; Jeremiah 15:18. This is explained in 2-Samuel 7:16, where the word established is the same word as is rendered sure in Isaiah.
Before thee - Before Me is probably the true reading in 2-Samuel 7:15-16 (if the rest of the text be sound), according to the analogy of Jeremiah 35:19; 1-Samuel 2:30, 1-Samuel 2:35; and many other places; whereas the idea contained in the reading, before thee, is unparalleled. But the reading in 1-Chronicles 17:13 is quite different: "As I took it from him that was before thee," meaning Saul, which gives a very good sense, and suggests that the text here may have been corrupted.

But my mercy shall not depart away from him, as I took it from Saul - His house shall be a lasting house, and he shall die in the throne of Israel, his children succeeding him; and the spiritual seed, Christ, possessing and ruling in that throne to the end of time.
The family of Saul became totally extinct; the family of David remained till the incarnation. Joseph and Mary were both of that family; Jesus was the only heir to the kingdom of Israel; he did not choose to sit on the secular throne, he ascended the spiritual throne, and now he is exalted to the right hand of God, a Prince and a Savior, to give repentance and remission of sins. See the observations at the end of the chapter, 2-Samuel 7:25 (note).
Many have applied these verses and their parallels to support the doctrine of unconditional final perseverance; but with it the text has nothing to do; and were we to press it, because of the antitype, Solomon, the doctrine would most evidently be ruined, for there is neither proof nor evidence of Solomon's salvation.

But my mercy shall not depart away from him,.... Which is not to be understood of special mercy and grace, though it is true of these with respect to Solomon, and so to all the adopted children of God, see Psalm 89:32; but then this here designs such mercy as may be taken away from another, and as it was from Saul, as it follows:
as I took it from Saul, whom I put away before thee; and therefore must be understood of his mercy and kindness, in giving him a kingdom, and setting him on the throne; this should not be taken away from him, as it was from Saul, whom God rejected from being king; not him personally, but his posterity; but so the Lord would not do, nor did he, to Solomon, in whose posterity the kingdom of Judah continued to the Babylonish captivity.

My mercy - That is, Or, my kindness, that is, the kingdom which I have mercifully promised to thee and thine. From Saul - In regard of his posterity, for the kingdom was continued to his person during life.