Dawud bin Abi Salih says that one day Marwan was passing by when he saw a man with his face placed on a grave (on the blessed chamber of the Prophet, peace be upon him). He said, "Do you know what you are doing?" The man turned towards him, and it was Hazrat Abu Ayyub (may Allah be pleased with him). He said, "Yes! I have come to the Prophet (peace be upon him); I have not come to a stone. I heard the Prophet (peace be upon him) say: 'Do not weep for the religion when its people are its caretakers, but weep for it when the unworthy become its caretakers.'"