Yahya related to me from Malik from Hisham ibn Urwa from his father that the Messenger of Allah ﷺ was asked about cleaning after excretion. He replied, "Are any of you unable to find three stones?"

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ ﷺ سُئِلَ عَنْ الاِسْتِطَابَةِ فَقَالَ " أَوَلاَ يَجِدُ أَحَدُكُمْ ثَلاَثَةَ أَحْجَارٍ " .