Psalms 47:9
9The princes of the peoples are gathered together, the people of the God of Abraham. For the shields of the earth belong to God. He is greatly exalted!
Arminian
The princes of the peoples are gathered together, the people of the God of Abraham. For the shields of the earth belong to God. He is greatly exalted! Wesley: The princes—The Gentiles, who were divided in their principles, and interests, and religions, are now united and gathered together to Christ, laying their scepters at his feet, and jointly owning his worship and service. Of the God—He doth not say the people of Abraham, lest this should be appropriated to the Israelites; but the people of the God of Abraham who worship the God of Abraham, whether they be Jews or Gentiles. The Shields—The princes or rulers, called shields (Hosea 4:18), protectors of their people—the Lord's, at his disposal in hearts and kingdoms. Exalted—By this means God shall be greatly glorified.
Welcome princes gathered as worshipers of Abraham's God, Jew and Gentile. Own that shields belong to him; refuse a people-of-Abraham claim that shuts out the nations.
Reformed
Calvin: Princes of the peoples gathered to the people of the God of Abraham—aliens grafted into Abraham's family so the kingdom extends; gospel does not remove Jews from the covenant but joins Gentiles to them; not bastard Jews cut off by unbelief, but the holy root and remaining branches; Church unity is unfeigned obedience to the word; shields of the earth are God's—princes he may engraft, or his many bucklers preserving the world.
Seek a place among Abraham's God-people by faith's graft. Yield scepters to him; refuse a gathering that will not obey the word.