Verse 4. - All the earth shall worship thee, and shall sing unto thee; they shall sing to thy Name (see above, ver. 1, and compare the passages quoted in the comment ad loc.). Dr. Kay notes that "the universality of the Church is clearly contemplated" in all the psalms from Psalm 65 to Psalm 68.

66:1-7 The holy church throughout all the world lifts up her voice, to laud that Name which is above every name, to make the praise of Jesus glorious, both by word and deed; that others may be led to glorify him also. But nothing can bring men to do this aright, unless his effectual grace create their hearts anew unto holiness; and in the redemption by the death of Christ, and the glorious deliverances it effects, are more wondrous works than Israel's deliverance from Egyptian bondage.All the earth shall worship thee,.... The Messiah, who is equal with God; the Creator of men; the Redeemer of his people; the Head of the church, and King of saints; their Lord, and therefore to be worshipped; with internal worship, in the exercise of faith, hope, and love; and with external worship, in the word and ordinances, by prayer and praise, public and private. This universal worship, that will be yielded him, will be in the latter day; which shows that this psalm respects those times, when Christ shall be King over all the earth, and his name, worship, and religion, one, Zechariah 14:9;

and shall sing unto thee; the song of Moses and the Lamb, the Lamb's new song, the song of redeeming grace; which none but the redeemed ever can sing aright, Revelation 14:3;

they shall sing to thy name; or, "they shall", or "let them sing thy name" (x); thou shall be the subject of their song; thy person, offices, kingdom, grace, and glory: or they shall sing to the honour of thy name, as in Psalm 66:2.

Selah; on this word; see Gill on Psalm 3:2.

(x) "cantent nomen tuum", Gejerus; "cantabunt nomen tuum", Michaelis.