Sahih Muslim , Book 5, Hadith 59 (In-Book) ⓘ
Mu'aiqib quoted the Messenger of Allah mentioning the removal of pebbles from the ground where he prostrated himself. He (the Prophet) said: It you must do so, do it only once.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا هِشَامٌ الدَّسْتَوَائِيُّ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ مُعَيْقِيبٍ، قَالَ ذَكَرَ النَّبِيُّ صلى الله عليه وسلم الْمَسْحَ فِي الْمَسْجِدِ - يَعْنِي الْحَصَى - قَالَ " إِنْ كُنْتَ لاَ بُدَّ فَاعِلاً فَوَاحِدَةً " .
also referenced under: Hadith 546 (Reference) & Book 4, Hadith 1114 (USC-MSA)