قَالَ صلى الله عليه وسلم: مَنْ قَالَ (سُبْحَانَ اللَّهِ وَبِحَمْدِهِ) فِي يَوْمٍ مِائَةَ مَرَّةٍ حُطَّتْ خَطَايَاهُ وَلَوْ كَانَتْ مِثْلَ زَبَدِ الْبَحْر.
Allah's Messenger (ﷺ) said: Whoever says: Subḥānallāhi wa biḥamdihi. one hundred times a day, will have his sins forgiven even if they are like the foam of the sea.
Allah's Messenger (ﷺ) said: Whoever says: Glorified is Allah and praised is He. one hundred times a day, will have his sins forgiven even if they are like the foam of the sea.
Al-Bukhari 7/168, Muslim 4/2071, see also invocation no. 91 of this book.