Abu Sa'id al-Khudri reported that he came to the Messenger of Allah, may Allah bless him and grant him peace, while he had a fever. He had a covering over him. He placed his hand on him and discovered that it was hot above the covering. Abu Sa'id exclaimed, 'How hot your fever is, Messenger of Allah!' He said, 'We are like that. The affliction is hard on us, but the reward is doubled for us.' He said, 'Messenger of Allah, which people have the greatest affliction?' He replied, 'The Prophets, and then the righteous. One of them was tested by poverty to such an extent that he could only find a robe to cover himself with and he wore it. Another was tested by fleas until they killed him. They have greater joy in affliction than one of you has in gifts."