Abu Razin says that once I saw Hazrat Abu Hurairah (may Allah be pleased with him) striking his forehead with his hand. He was saying, "O Iraqi, do you think that I could falsely attribute something to the Prophet Muhammad (peace and blessings be upon him)? You would obtain something without effort and its burden would fall upon me. I bear witness that I heard the Prophet Muhammad (peace and blessings be upon him) say: When the strap of one of you’s sandal breaks, he should not walk wearing the other sandal until he has fixed it. And when a dog puts its mouth in the vessel of one of you, he should not perform ablution from that vessel until he has washed it seven times."