Sahl At-Tustari, a great Sufi from Tustar, had a neighbor who was an infidel, dhimmi.  Dirt from the neighbor's latrine flowed and polluted Sahl's house.  But he wasn't angry.  Every day Sahl put a large vessel under the neighbor's toilet.  At night, Sahl removed the dirt so it would not be seen by others.  He did this until the day before his death. 

On that day he invited his neighbor, he said, "Come in and see what's inside!"  The neighbor then walked in and saw water droplets and dirt falling into the vessel Sahl had placed.  The dhimmi asked, "What do I see this?"  Sahl replied, "It's been a long time since your house's toilet poo has been dripping into my house. I took it in during the day and I threw it out at night. Now, I feel like my death is near and I'm afraid no one else is willing to do it again.