Cross reference
Hebrews 5:10
10 Being named by God a high priest of the order of Melchizedek.
Hebrews 5:5-6
5 In the same way Christ did not take for himself the glory of being made a high priest, but was given it by him who said, You are my Son, this day I have given you being:
6 As he says in another place, You are a priest for ever after the order of Melchizedek.
Hebrews 6:20
20 Where Jesus has gone before us, as a high priest for ever after the order of Melchizedek.