Sahih Muslim — Hadith #8784

Has told us [Muhammad bin al-Mutsanna] has told us [Yahya bin Sa'id] from [Hisham] he said, has told me [Ibnu Abi Kathir] from [Abu Salamah] from [Mu'aiqib] that they asked the Prophet sallallaahu'alaihiwasallam about cleaning the place of prostration in prayer, so he said, "Just once." And it has been told to me [Ubaidullah bin Umar al-Qawariri] has told us [Khalid, namely Ibn al-Harits] has told us [Hisham] with this isnad, and he said in it, has told it to me [Mu'aiqib] -- Through another route of narration