Albert Barnes Commentary Psalms 72:15

"And they shall live; and to him shall be given of the gold of Sheba: And men shall pray for him continually; They shall bless him all the day long." — Psalms 72:15 (ASV)

And he shall live - As far as the language here is concerned, this may refer either to the king—the Messiah—or to the poor and oppressed man.

If the former, then it means that the life of the Messiah would be perpetual. He would not be cut off as other sovereigns are; there would be no change of dynasty. He would be, as a king, the same—unchanging and unchanged—throughout all generations of people and all the revolutions that occur on the earth.

This would align with the truth and with what is said elsewhere about the Messiah. However, perhaps the more correct interpretation is the latter: that it refers to the poor and oppressed man, meaning that he would live to bring an offering to the Messiah and to pray for the extension of His kingdom on the earth.

And to him shall be given - Margin, “one shall give.” Literally, “he shall give to him”; that is, the man who has enjoyed His protection and has been saved by Him will do this. As a token of his gratitude and as an expression of his submission, he will bring to Him a costly offering, the gold of Sheba.

Of the gold of Sheba - One of the gifts referred to in (Psalms 72:10), as coming from Sheba. (Isaiah 45:14). The meaning is that those who are redeemed by Him—who owe so much to Him for protecting and saving them—will bring the most valued things of the earth, or will consecrate to Him all that they are and all that they possess. (Compare to Isaiah 60:5-7, Isaiah 60:13–17).

Prayer also shall be made for him continually - Not for Him personally, but for the success of His reign, for the extension of His kingdom. Prayer made for “that” is made for “Him,” for He is identified with that.

And daily shall he be praised - Every day; constantly. It will not be only at stated and distant intervals—at set seasons and on special occasions—but those who love Him will do it every day. It is not necessary to say that this aligns with the truth concerning those who are the friends and followers of the Messiah—the Lord Jesus.

Their lives are lives of praise and gratitude. From their dwellings daily praise ascends to Him. From their hearts, praise is constant: praise uttered in the private room and in the family, praise breathed forth from the heart, whether on the farm, in the workshop, on a journey, or in the busy marketplaces.

The time will come when this will be universal; when He who can take in at a glance the condition of the world will see it to be a world of praise; when He who looks on all hearts at the same moment will see a world full of thankfulness.