حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ عُمَرَ بْنِ رَاشِدٍ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي الدَّرْدَاءِ، قَالَ قَالَ لِي رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ عَلَيْكَ بِسُبْحَانَ اللَّهِ وَالْحَمْدُ لِلَّهِ وَلاَ إِلَهَ إِلاَّ اللَّهُ وَاللَّهُ أَكْبَرُ فَإِنَّهَا - يَعْنِي - يَحْطُطْنَ الْخَطَايَا كَمَا تَحُطُّ الشَّجَرَةُ وَرَقَهَا ‏"‏ ‏.‏

It was narrated that Abu Darda' said: "The Messenger of Allah (PBUH) said to me: 'You should recite Subhan-Allah, wal-Hamdu-Lillah, wa la ilahah illallah, wa Allahu Akbar (Glory is to Allah, praise is to Allah, none has the right to be worshiped but Allah, and Allah is the Most Great), for it sheds sins like the tree sheds its leaves.'" Translation Not Available

Book Ref: Sunan Ibn Majah Book 33 Hadith 3813
Web Ref:  Sunan Ibn Majah Vol 5 Book 33 Hadith 3813