2 Corinthians 12:6-7

But if I desire to boast, I will not be a yold (fool) for I will speak HaEmes; but I spare you, lest anyone gives me credit beyond what he sees in me or hears in me. Therefore, lest I should be too exalted especially by the excess of my chazonot, there was given to me a kotz (thorn, splinter) in my basar, a malach of HaSatan, for the purpose of using his fists on me, lest I should be too exalted.