Abdul Rahman Ibn Mahdi related: "Sufyan died at my place. When he was on his deathbed and the agonies of death became severe, he started to cry. One man said to him: 'O Abu 'Abdullah, is this because you have, seemingly, committed too many sins?!' Sufyan then picked up something from the floor and said:' By Allah, my sins are less important to me than what I have picked from the floor. But I fear that Allah might take away my Iman from the right before I die."
-Hilyah al'Awliya (7/12)-