Psalms 68:31 - Coke's Commentary on the Holy Bible

Princes shall come out of Egypt, &c.— Rather, Let princes come;—Let Ethiopia stretch, &c. The word חשׁמנים chashmanniim, rendered princes, signifies a princely person, accompanied by a numerous attendance; Parkhurst thinks it signifies persons in great haste. By Ethiopia many understand the country properly so called, and I see no reason to depart from this sense: the country is put for the inhabitants of it. The words may be rendered Let Ethiopia exercise her hands, or accustom herself to lift them up to God; or teach and direct her hands towards God: and the meaning is, that God would so protect and defend Jerusalem, where the ark of the presence was now placed, as that the inhabitants of Egypt and Ethiopia, and all the enemies of his people, so far from regarding it with a hostile disposition, should reverence it as the habitation of God; send solemn embassies to it, with sacrifices in honour of him; with uplifted hands devoutly worship before his sanctuary, and to become the real patrons and protectors of it: but, doubtless, the passage has a much higher meaning, and refers also to the conversion of the Gentiles, and their submission to the kingdom of Christ.