This is apparently a promise relating to Christ, for David's line had failed long since, had it not been continued in Christ, whose kingdom is and shall be an everlasting kingdom. So long as Israel remained a kingdom, those of the line of David ruled over it; when that failed, Christ came in the flesh, who ruleth, and shall rule, over the Israel of God for ever.
Related Commentaries of Jeremiah 33:17
Jeremiah 33:17
17 For thus saith the LORD; Davida shall never want a man to sit upon the throne of the house of Israel;