حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ ، حَدَّثَنَا هِشَامٌ ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ ، عَنْ أَبِي سَلَمَةَ ، حَدَّثَنِي مُعَيْقِيبٌ ، أَنّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ،قِيلَ لَهُ فِي الْمَسْحِ فِي الْمَسْجِدِ قَالَ : " إِنْ كُنْتَ لَا بُدَّ فَاعِلًا، فَوَاحِدَةً ".
قَالَ هِشَامٌ : أُرَاهُ قَالَ : يَعْنِي : مَسْحِ الْحَصَا

Wahb bin Jarir narrated to us, Hisham narrated to us, on the authority of Yahya bin Abi Kathir, on the authority of Abu Salamah, Mu’aqib narrated to me, that the Messenger of God, may God’s prayers and peace be upon him, May God bless him and grant him peace. It was said to him about wiping in the mosque. He said: “If you must do it, then one.”
Hisham said: I think he said: meaning: wiping the gravel.