Hebrews 5:2:

Who can have compassion on the ignorant, and on them that are out of the way; for that he himself also is compassed with infirmity.

See also:

Objection: Paul GLORIED in His INFIRMITIES – the Same Greek Word Used in Matthew 8:17 of What Jesus Took.  If Matthew 8:17 Refers to the Atonement, How Could Paul Glory in What Christ Took Away?