It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) led us in prayer at the house of Hazrat Umm Sulaim (may Allah be pleased with her) on an old mat, the color of which had changed due to its oldness. I had sprinkled water on it, then the Prophet (peace and blessings be upon him) performed prostration on it.