It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that he came to the Messenger of Allah (peace and blessings be upon him) while he (peace and blessings be upon him) was suffering from a severe fever, and there was a sheet over him (peace and blessings be upon him). He placed his hand on the sheet and felt the heat even from above the sheet. So Abu Sa'id said: "O Messenger of Allah! How severe your fever is!" The Messenger of Allah (peace and blessings be upon him) said: "Such is our (the prophets') case: trials are made severe for us and our reward is also doubled." Then he asked: "O Messenger of Allah! Who among people are tried most severely?" He (peace and blessings be upon him) said: "The prophets." He asked: "Then who?" He (peace and blessings be upon him) said: "The scholars." He asked: "Then who?" He said: "Then the righteous. One of them would be tried with poverty to such an extent that he had nothing to wear except a single cloak, and another would be tried with lice (in great number) until they killed him; and one of them would be happier with his trial than any of you is with a gift (from Allah)." This hadith is sahih (authentic) on the condition of Imam Muslim, because he used Hisham bin Sa'd as evidence. Moreover, it has many supporting narrations, and the hadith of Asim bin Bahdalah from Mus'ab bin Sa'd from his father has many routes that are discussed in the study circles of knowledge, and al-Ala' bin al-Musayyab corroborated Asim bin Bahdalah (in narrating it from Mus'ab bin Sa'd).