Hebrews 7:2

7:2 To him also Abraham apportioned a tithe of everything. His name first means king of righteousness, then king of Salem, that is, king of peace.

Hebrews 7:21

7:21 but Jesus did so with a sworn affirmation by the one who said to him, “The Lord has sworn and will not change his mind, ‘You are a priest forever’” –