وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ قَالَ: سُبْحَانَ اللَّهِ وَبِحَمْدِهِ فِي يَوْمٍ مِائَةَ مَرَّةٍ حُطَّتْ خَطَايَاهُ وَإِنْ كَانَتْ مِثْلَ زَبَدِ الْبَحْرِ»
He reported God’s messenger as saying that if anyone says a hundred times in a day, “Glory be to God, and I begin with praise to Him”, his sins will be removed from him though they are like the foam of the sea.
Mishkat al-Masabih 2196, Book 10, Supplications, Hadith 70. 1 min read