John Wesley on Psalms 47:9

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. And altho' he mentions their conversion only, yet the conversion of their people might reasonably be supposed. 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, who are called shields, Hosea 4:18, because by their office they are the common prosecutors of all their people. These are the Lord's, at his disposal, or subject to his dominion, both as to their hearts and kingdoms. Exalted - By this means God shall be greatly glorified.