(7) باب النَّهْىِ عَنْ مَسْحِ الْحَصَى، فِي الصَّلاَةِ
It was narrated that Abu Dharr said:
"The Messenger of Allah (ﷺ) said: 'When any one of you stands in prayer, let him not smooth the pebbles, for he is facing Mercy.'" (ES)
Reference (ES): Sunan an-Nasa'i 1191 (ES)
In-book reference (ES): Book 13, Hadith 13 (ES)
English translation (ES): Vol. 2, Book 13, Hadith 1192 (ES)