´It was narrated that Mu’aiqib said:` “The Messenger of Allah (ﷺ) said, concerning smoothing the pebbles during prayer: ‘If you must do that, then do it only once.’”
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 1026
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:بخاري ومسلم