Ata' bin Yasar (may Allah have mercy on him) narrates that Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) went in to the Prophet (peace and blessings be upon him) while he (peace and blessings be upon him) was in a state of fever and had a sheet over him. He placed his hand on him (peace and blessings be upon him) and felt the heat from above the sheet (blanket). Sayyiduna Abu Sa'id (may Allah be pleased with him) said: O Messenger of Allah, how intense is the heat of your fever! He (peace and blessings be upon him) said: "Indeed, our trials are made severe like this, and our reward is also doubled." Then Sayyiduna Abu Sa'id (may Allah be pleased with him) said: O Messenger of Allah, which people are most severely tried? He (peace and blessings be upon him) said: "The Prophets." He said: Then who? He (peace and blessings be upon him) said: "Then the scholars." He said: Then who? He (peace and blessings be upon him) said: "Then the righteous. One of them would be tried with poverty until he found nothing but a cloak to wear, and would be tried with lice until they killed him; and one of them would rejoice more at a trial than one of you rejoices at a gift."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6533