Hadith 1004
ذهاب احدى رجلى الرجل غفران نصف ذنوبه و ذهابهما كلاهما غفران ذنوبه كلها
"The affliction of one foot of a person becomes a means for the forgiveness of half of his sins, while the affliction of both feet becomes a means for the forgiveness of all his sins."