In Hebrews 5:10, the same designation 'high priest after the order of Melchizedek' is stated as a conclusion, echoing the quotation in Hebrews 5:6.

In Hebrews 6:20, Jesus is described as a forerunner who has become high priest forever after Melchizedek's order, directly expanding on the quote in Hebrews 5:6.

Hebrews 7:15 develops the same argument: Jesus arises as a priest in the likeness of Melchizedek, deepening the point about the order.

Hebrews 7:17 directly quotes the same Psalm 110:4 verse, reinforcing the eternal priesthood by repetition.

Hebrews 7:21 adds the oath from Psalm 110:4, emphasizing the unchangeable nature of Christ's priesthood.

In Hebrews 7:11, the author develops the Melchizedek priesthood argument, showing why a change of law was necessary for perfection.

Genesis 14:18 introduces Melchizedek as priest-king, providing the historical type for Christ's eternal priesthood.

Psalm 110:4 is the original OT declaration that Jesus is a priest forever after the order of Melchizedek.