Hebrews 5:1-6
5:1 For every high priest is taken from among the people and appointed to represent them before God, to offer both gifts and sacrifices for sins.
5:2 He is able to deal compassionately with those who are ignorant and erring, since he also is subject to weakness,
5:3 and for this reason he is obligated to make sin offerings for himself as well as for the people.
5:4 And no one assumes this honor on his own initiative, but only when called to it by God, as in fact Aaron was.
5:5 So also Christ did not glorify himself in becoming high priest, but the one who glorified him was God, who said to him, “You are my Son! Today I have fathered you,”
5:6 as also in another place God says, “You are a priest forever in the order of Melchizedek.”