Mukhtasar Bukhari

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) and Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) used to say: "No hardship (or illness, sorrow, grief, or pain) befalls a Muslim except that Allah, in return, wipes out some of his sins because of it, even if a thorn pricks him (then in exchange for that too, some sin is wiped out)."

Narrated Abu Huraira (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) used to say: "The example of a believer is like that of a fresh crop; the wind bends it from one side to another, but when the wind stops, it stands straight again. In this way, a believer remains safe from affliction. And the example of a sinner is like that of a pine tree, which stands straight and stiff; (so) whenever Allah wills, He uproots it."

Narrated Abu Huraira (may Allah be pleased with him): The Messenger of Allah (peace and blessings of Allah be upon him) used to say: "When Allah intends good for someone, He afflicts him with hardship."