Psalms 68:31

“For who [is] God save the Lord? etc.] Or Jehovah: there is but one God, and Jehovah is he; there is none besides him, nor any like him: there are many that are called gods, nominal deities, who are not by nature gods; fictitious ones, the idols of the Gentiles, made of gold, silver, brass, wood, and stone; but there is but one true God: there are gods, in an improper sense, as civil magistrates; but there is none really and truly so but the Lord; which is to be understood, not of Jehovah the Father, to the exclusion of the Son and Spirit; for the Son is Jehovah, and the Spirit is Jehovah; both are so called, as well as the Father, and all three one God; or who [is] a rock save our God? to…”

“Princes--or, literally, "fat ones," the most eminent from the most wealthy, and the most distant nation, represent the universal subjection. stretch out her hands--or, "make to run her hands," denoting haste.”

“Princes shall come out of Egypt - That is, Shall come and acknowledge the true God. Egypt is referred to here as one of the most prominent of the foreign nations then known; and the idea is, that the distinguished men of foreign nations - the rulers and princes of the world - would come and submit themselves to God, and be united to his people. The word rendered “princes” here - חשׁמנים chashmaniym - occurs nowhere else in the Scriptures. It means, according to Gesenius (Lexicon), the fat; then, the rich; the opulent; nobles. It is the word from which the name “Hasmonean” (or Asmonean), which was given by the Jews to the Maccabees, or Jewish princes in the time of the Jewish history between…”

“Ethiopia - He names these, as the ancient enemies of God, and of his people; but by them he understands all other nations of the like character. Unto God - Begging mercy of him. This prophecy, as also the next verse, evidently belongs to the times of the Messiah. Psalms 68:33”

“Princes: Psa 72:8-11; Isa 19:18-25, Isa 45:14, Isa 60:6, Isa 60:7, Isa 66:19 Ethiopia: Zep 3:10; Act 8:27-40 stretch: Psa 44:20, Psa 88:9, Psa 143:6; Kg1 8:22 Psalms 68:32”