“For every high priest chosen from among men is appointed to act on behalf of men in relation to God, to offer gifts and sacrifices for sins. He can deal gently with the ignorant and wayward, since he himself is beset with weakness. Because of this he is obligated to offer sacrifice for his own sins just as he does for those of the people. And no one takes this honor for himself, but only when called by God, just as Aaron was. So also Christ did not exalt himself to be made a high priest, but was appointed by him who said to him, “You are my Son, today I have begotten you”; as he says also in another place, “You are a priest forever, after the order of Melchizedek.””
‭‭Hebrews‬ ‭5:1-6‬

“And Melchizedek king of Salem brought out bread and wine. (He was priest of God Most High.) And he blessed him and said, “Blessed be Abram by God Most High, Possessor of heaven and earth; and blessed be God Most High, who has delivered your enemies into your hand!” And Abram gave him a tenth of everything.”
‭‭Genesis‬ ‭14:18-20‬

“The Lord has sworn and will not change his mind, “You are a priest forever after the order of Melchizedek.” The Lord is at your right hand; he will shatter kings on the day of his wrath.”
‭‭Psalms‬ ‭110:4-5‬ ‭

“And being made perfect, he became the source of eternal salvation to all who obey him, being designated by God a high priest after the order of Melchizedek.”
‭‭Hebrews‬ ‭5:9-10‬ ‭

“For it is evident that our Lord was descended from Judah, and in connection with that tribe Moses said nothing about priests. This becomes even more evident when another priest arises in the likeness of Melchizedek, who has become a priest, not on the basis of a legal requirement concerning bodily descent, but by the power of an indestructible life. For it is witnessed of him, “You are a priest forever, after the order of Melchizedek.””
‭‭Hebrews‬ ‭7:14-17‬ ‭