How do we know Jesus is both King and High Priest?

In the biblical narrative, Jesus uniquely occupies the dual role of King and High Priest, a position that was not permitted for the Levitical priests in the Old Testament. Hebrews elaborates on this by presenting Christ as a priest in the order of Melchizedek, who was both a king and a priest. This duality signifies His authority over all creation and His intercessory role for believers. As the fulfillment of both offices, Jesus brings peace and reconciliation, exemplifying His sovereignty and mediatory function.