All the earth shall worship thee. The Psalmist had good reason for insisting upon this one point again and again. Though all tongues were tuned to the praise of God, they never could adequately extol it; and yet such are the negligence and the perversity of men, that they will scarcely lift one feeble note in celebration of a theme which should command their united strength and might. We have another prediction here, of a time being to come when God would be worshipped, not only by the Jews, a small section of the human family, but by all the nations which would be eventually brought under his government. And we are not to consider that he refers to such a worship as would be constrained, and only not withheld, because resistance might be dangerous, but to the sincere homage of the heart -- they shall sing unto thee! they shall sing unto thy name Praise is the best of all sacrifices, (as we are told, Psalm 50:14, 23) and the true evidence of godliness.

All the earth shall worship thee - That is, all the inhabitants of the world will bow down before thee, or render thee homage. The time will come when thy right to reign will be universally acknowledged, or when thou wilt everywhere be adored as the true God. This is in accordance with all the statements in the Bible. See the notes at Psalm 22:27; Compare the notes at Isaiah 45:23; notes at Romans 14:11.
And shall sing unto thee - Shall celebrate thy praises. "To thy name." To thee.

All the earth - The whole land shall worship thee. There shall no more an idol be found among the tribes of Israel. This was iterally true. After the Babylonish captivity the Israelites never relapsed into idolatry.
Selah - Remark it: this is a well attested truth.

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, Zac 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.