حَدَّثَنَا نَصْرُ بْنُ عَبْدِ الرَّحْمَنِ الْكُوفِيُّ، حَدَّثَنَا الْمُحَارِبِيُّ، عَنْ مَالِكِ بْنِ أَنَسٍ، عَنْ سُمَىٍّ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ مَنْ قَالَ سُبْحَانَ اللَّهِ وَبِحَمْدِهِ مِائَةَ مَرَّةٍ غُفِرَتْ لَهُ ذُنُوبُهُ وَإِنْ كَانَتْ مِثْلَ زَبَدِ الْبَحْرِ ‏"‏ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏

Abu Hurairah narrated that : the Messenger of Allah (PBUH) said: “Whoever says: ‘Glory is to Allah, and with His Praise (Subḥān Allāh, wa biḥamdih)’ a hundred times, his sins are forgiven, even if they were like the foam of the sea.” Translation Not Available

Book Ref: Jamiya Tirmidhi Book 48 Hadith 3466
Web Ref:  Jamiya Tirmidhi Vol 6 Book 45 Hadith 3466