Sa’d ibn Abi Waqqas (ra) said: I said: “O Messenger of Allah, which of the people are most sorely tested?” He said: “The Prophets, then the next best and the next best. A man will be tested in accordance with his level of religious commitment. If his religious commitment is strong, he will be tested more severely, and if his religious commitment is weak, he will be tested in accordance with his religious commitment. Calamity will keep befalling a person until he walks on the earth with no sin on him.” Reported in At-Tirmidhi.