Hebrews 5:4-6

Verse

4 No one takes this honor upon himself; he must be called by God, just as Aaron was. 5 So also Christ did not take upon Himself the glory of becoming a high priest, but He was called by the One who said to Him: “You are My Son; today I have become Your Father.” 6 And in another passage God says: “You are a priest forever in the order of Melchizedek.” (BSB)