Hebrews 5:2

5:2 He is able to deal compassionately with those who are ignorant and erring, since he also is subject to weakness,

Hebrews 7:28

7:28 For the law appoints as high priests men subject to weakness, ¹  but the word of solemn affirmation that came after the law appoints a son made perfect forever.

[7:28]  ¹ sn See Heb 5:2 where this concept was introduced.