'High priesthood' in the Bible

So even Christ did not claim for himself the dignity of the high priesthood, but he was appointed to it by him who said to him, "You are my Son! I have today become your Father!"

For the Law appoints to the high priesthood men full of imperfection; but this utterance about the making of the oath, which came long after the Law, appoints a son, fully qualified to be high priest forever.