This is blessing of the nations in the deliverance of the Jews in the latter day. Christ at the head of the Jews, or rather as the Head of the Jews, ready to pay the vows uttered in the time of their trouble. It is the voice of the upright Remnant, He being so really, they in acceptance having integrity, as spoken of in Scripture, as Noah, etc., to God, but really truly only in Him, and therefore all this is spoken in His Person, and He has fulfilled all this, i.e., what in His own Person made Him capable of so taking the lead. To verse 4 is the blessing arising from the dealings of God to the nations, called to praise Him.
5. This verse in reference to old doings, calls them to see present similar ones putting down the rebellious.
8. This verse turns to the acknowledgment of for whom, and in what, all this is shown—"Bless our God... he hath tried... hath also but delivered us." Note "people" (ammim); so Psa. 67:33Let the people praise thee, O God; let all the people praise thee. (Psalm 67:3).
13. Christ here takes up the word, having His mouth opened, as it were, by the blessing of His people, all along in His heart.
It is then progressively developative from the general call to the nations, to the special feelings of Christ.
This Psalm is a consequent summons to all the nations or lands. It is the song of the righteous, proved such, after their acceptance, and so far restoration, but before the submission of the nations. The judgment (which delivered them, the Remnant, from their immediate oppressors, Antichrist, etc.), of whom, we have seen, is the occasion of this summons to the nations of the earth at large. Having been in fullest trouble, they can now say “Our God" in deliverance. Christ is the foundation of it, in the close.