Hebrews 2:10

2:10 For it was fitting for him, for whom and through whom all things exist, in bringing many sons to glory, to make the pioneer of their salvation perfect through sufferings.

Hebrews 5:8-9

5:8 Although he was a son, he learned obedience through the things he suffered. 5:9 And by being perfected in this way, he became the source of eternal salvation to all who obey him,

Hebrews 7:28

7:28 For the law appoints as high priests men subject to weakness, but the word of solemn affirmation that came after the law appoints a son made perfect forever.