Augustine of Hippo
It could not be said, "And He shall live," if that life did not point to the existence in which He will no longer experience death, for death will hold no dominion over Him (Rom. 6:9). Thus, He will be revived, looked down upon by death, as another prophet declares, "His life shall be taken away from the earth" (Is. 53:8). What then is to be given to Him from the riches of Arabia? The gold that Solomon of old received is symbolically transferred in this psalm to the true Solomon, the genuine Peacemaker. The former Solomon had no authority that reached from the river to the ends of the earth. This foretelling suggests that even the wise among the nations will come to believe in Christ.
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Here, Arabia signifies the Gentiles, the golden wisdom that surpasses all teachings, just as gold stands out among metals. As it is written, "Receive understanding as silver, and wisdom as tried gold" (Proverbs 8:10). They will continually pray for Him. The Greek phrase περὶ αὐτοῦ can be interpreted as concerning Him, or for Him, or to Him. But what is it concerning Him, other than perhaps what we seek when we pray, "Thy kingdom come" (Matt. 6:10)? The advent of Christ will bestow the kingdom of God upon believers. Yet, the interpretation of "for Him" poses a challenge; when one prays for the Church, one is in fact praying for oneself, as she is His Body. In reference to Christ and the Church, preceding the great Sacrament (Eph. 5:32), there will be two united as one flesh. The following statement—that they will bless Him all day long, meaning at all times—is quite clear.