English Translation of Hadith
Hazrat Abu Saeed & Abu Hurairah (May Allah be pleased with them) reported: The Messenger of Allah [SAWW](PBUH) said, "Never a believer is stricken with a discomfort, an illness, an anxiety, a grief or mental worry or even the pricking of a thorn but Allah will expiate his sins on account of his patience".
[Al-Bukhari Book 07, Chapter 70, Hadith # 545]
Lesson : as mentioned above in Surah Ar-Rum [The Romans] Ayat 36. “Allah cause mankind to taste of mercy, they rejoice therein” This Hadith mentions the special Grace and Mercy of Allah for the Muslims. It relates how Allah turns the hardships and troubles suffered by a Muslim into a means of expiation for his sins. But this is only possible if the believer exercises patience. However, if he starts wailing instead of showing patience then besides suffering hardships, he would be deprived of the reward which lies in bearing them patiently. Thus, he shall have to take the burden of additional sins also.