Hebrews 7:15

And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest,

Cross-reference

Hebrews 7:3 describes Melchizedek's eternal, fatherless priesthood — the likeness in which Jesus arises.

Hebrews 7:11 argues the Levitical priesthood was insufficient, setting up the need for a Melchizedek priest.

Hebrews 5:6 earlier cites the same Psalm 110:4, introducing the Melchizedek priesthood Hebrews 7:15 builds on.

Psalm 110:4 is the prophecy of a priest forever like Melchizedek which Hebrews 7:15 alludes to.