Fortress of the Muslim (Hisn al-Muslim)
حصن المسلم
(130) Chapter: Excellence of Tasbih, Tahmid, Tahlil, and Takbir
(130) من فضل التسبيح والتحميد ، والتهليل ، والتكبير
Hisn al-Muslim 254 
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. Reference: Al-Bukhari 7/168, Muslim 4/2071, see also invocation no. 91 of this book.
قَالَ صلى الله عليه وسلم: مَنْ قَالَ (سُبْحَانَ اللَّهِ وَبِحَمْدِهِ) فِي يَوْمٍ مِائَةَ مَرَّةٍ حُطَّتْ خَطَايَاهُ وَلَوْ كَانَتْ مِثْلَ زَبَدِ الْبَحْر.
Reference : Hisn al-Muslim 254