The answer is: Melchizedek

Psalm 110:4 - This verse references Melchizedek, a mysterious figure who served as both king and priest, highlighting the dual role of authority in God's plan. His encounter with Abraham (Genesis 14:18-20) foreshadows Christ's unique priesthood, transcending Levitical traditions. The New Testament, especially Hebrews 7, elaborates on this profound connection.

Ah, Melchizedek! The name floats through both Old and New Testaments like a riddle wrapped in an enigma. This ancient figure, king of Salem and priest of the Most High God, first appears in Genesis 14, where he meets Abraham after a victorious battle. Not only does he bless Abraham, but he also introduces bread and wine—many see this as tapping into a rich, symbolic foreshadowing of communion found in the Christian tradition.

Drifting along in Psalm 110, Melchizedek’s dual role sets him apart, revealing an ideal of leadership that integrates domains of spiritual and temporal authority. His unique status shines a light on the limitations of the Levitical priesthood; while those priests stemmed from Aaron, Melchizedek is seemingly ordained by God Himself, offering us a glimpse into what “eternal” perfection could be. Fancy that—two roles filled by one!

But it's not just an ancient story; Melchizedek finds echoes in various places across theology. For example, in Hebrews 7, the author skillfully utilizes his background to deepen the understanding of Jesus's priesthood, emphasizing a higher calling that exceeds set traditions—a fresh twist for many grappling with established norms.

It’s noteworthy too that Melchizedek even shows up in the mystical traditions, where he’s sometimes seen as a divine figure. Much debate surrounds this multifaceted persona, asleep in our texts, waiting patiently for the curious to uncover its layers.