Hebrews 5:9-11

New International Version - UK

⁹ and, once made perfect, he became the source of eternal salvation for all who obey him ¹⁰ and was designated by God to be high priest in the order of Melchizedek.

Warning against falling away

¹¹ We have much to say about this, but it is hard to make it clear to you because you no longer try to understand.