Hadith 6:20
Ghundar narrated to us, from Shu'bah, from some of his companions, from al-Hakam, from Rabi' ibn 'Umaylah, from 'Ammar, who said: A Bedouin was with him, and they mentioned pain. 'Ammar said, "Have you ever suffered from pain?" He said, "No." 'Ammar said, "You are not one of us," or "Are you not one of us? There is no servant who is afflicted [with illness] but that his sins are shed from him just as a tree sheds its leaves." "And the disbeliever is afflicted, and his likeness is like that of a camel that was tied, so it did not know why it was tied, then it was released, so it did not know why it was released."
حدثنا غندر عن شعبة عن بعض أصحابه عن الحكم عن ربيع بن عميلة عن عمار قال كان عنده أعرابي فذكروا الوجع فقال عمار هل اشتكيت قط فقال لا فقال عمار ما أنت منا أو لست منا ما من عبد يبتلي إلا حط عنه خطاياه كما تحط الشجرة ورقها وإن الكافر يبتلى فمثله كمثل البعير عقل فلم يدر لما عقل فأطلق فلم يدر لما أطلق