How do we know Jesus is the King mentioned in Psalm 72?

The application of Psalm 72 to Jesus is supported by the New Testament, which explicitly identifies Him as the fulfillment of the Old Testament prophecies concerning the son of David. In 2 Samuel 7, God promised David that his descendant would sit on the throne forever. Furthermore, Acts 2 highlights that Jesus' resurrection and ascension fulfill this promise, demonstrating that He reigns as King. Hebrews 1 affirms that God appointed Jesus as heir of all things, reinforcing His authority and kingship. Thus, Psalm 72's portrayal of a king who will rule justly and have a worldwide dominion finds its ultimate realization in Jesus Christ.