It is narrated from Hazrat Abu Hurairah that when the verse of the Holy Qur'an { مَنْ یَعْمَلْ سُوئًا یُجْزَ بِہِ } was revealed, it was very hard on the Muslims and some of them were even afflicted (with hardship). They came to the service of the Holy Prophet, peace and blessings be upon him, and complained. The Prophet, peace and blessings be upon him, said: Remain between excess and deficiency, and stay on the right (path). Every hardship is an expiation for a Muslim, even a thorn that pricks him is also an expiation.