*Minor differences ignored. Grouped by changes, with first version listed as example.
Let the people praise thee - See Psalm 67:5. The repetition shows that this was the principal thought in the mind of the author of the psalm. It expresses an earnest - an intense - desire, that all nations should acknowledge God as the true God, and praise him for his mercies.
Let the people praise thee - Seeing the abundance of the blessings which the Gentiles were to receive, he calls again and again upon them to magnify God for such mercies.
Let the people praise thee, O God; let all the people praise thee. See Gill on Psalm 67:3. This is repeated from that preceding verse to show the earnest desire of the church that it might be so; or that there might be an occasion for it; the ardour of her mind, and fervency of her petitions, and how much she was solicitous for the praise and glory of God; or to declare the certainty of it, she most strongly believing that so it would be; as the Targum, "the people shall confess", &c. because of a new favour to be enjoyed, mentioned in Psalm 67:6.
The joyous prospect of the conversion of heathen, expressed in the same words as in Psalm 67:5, here receives as its foundation a joyous event of the present time: the earth has just yielded its fruit (cf. Psalm 85:13), the fruit that had been sown and hoped for. This increase of corn and fruits is a blessing and an earnest of further blessing, by virtue of which (Jeremiah 33:9; Isaiah 60:3; cf. on the contrary Joel 2:17) it shall come to pass that all peoples unto the uttermost bounds of the earth shall reverence the God of Israel. For it is the way of God, that all the good that He manifests towards Israel shall be for the well-being of mankind.
*More commentary available at chapter level.