A Prophecy of Christ's Sonship
Commentators overwhelmingly see this verse as a prophecy pointing to Jesus Christ. They argue that while David had a relationship with God, the title 'Father' implies a unique Sonship. Scholars like Calvin and Gill explain that this refers to Christ's preeminent status as God's 'firstborn' and eternally begotten Son, a relationship superior to that of any king, angel, or adopted believer, as referenced in Hebrews 1:5.