The Prophet ﷺ went out one winter day while the leaves were falling. He took hold of two branches of a tree, and the leaves began to fall from them.He said, "Abu Dharr."I replied, "At your service, Messenger of Allah."He said, "When a Muslim servant performs the prayer seeking the face of Allah, his sins fall away from him just as these leaves fall from this tree."
حدثنا أبو عامر حدثنا عبد الجليل يعني ابن عطية حدثنا مزاحم بن معاوية الضبي
أن النبي ﷺ خرج زمن الشتاء والورق يتهافت فأخذ بغصنين من شجرة قال فجعل ذلك الورق يتهافت قال فقال يا أبا ذر قلت لبيك يا رسول الله قال إن العبد المسلم ليصل الصلاة يريد بها وجه الله فتهافت عنه ذنوبه كما يتهافت هذا الورق عن هذه الشجرة
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Its chain is hasan, because of Muzahim bin Muawiya Dabbi, whom Abu Hatim considered unknown, while Ibn Hibban graded him trustworthy, and Munziri graded his hadith hasan in Targhib 1/248. Abdul-Jaleel bin Atiya Qaysi, Abu Salih, was graded trustworthy despite having some mistakes attributed to him.