Hebrews 5:6

2 He is able to deal gently with those who are ignorant and misguided, since he himself is beset by weakness.

3 That is why he is obligated to offer sacrifices for his own sins, as well as for the sins of the people.

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.”

7 During the days of Jesus’ earthly life, He offered up prayers and petitions with loud cries and tears to the One who could save Him from death, and He was heard because of His reverence.

8 Although He was a Son, He learned obedience from what He suffered.

9 And having been made perfect, He became the source of eternal salvation to all who obey Him

10 and was designated by God as high priest in the order of Melchizedek.

Read all of Hebrews 5