Yahya related to me from Malik from Sumayy, the mawla of Abu Bakr, from Abu Salih as-Samman from Abu Hurayra that the Messenger of Allah ﷺ said, "Whoever says, 'Glory be to Allah and with His praise' (Subhana'llah wa bi-hamdihi) one hundred times in a day will have his wrong actions taken away from him, even if they are as abundant as the foam on the sea."
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ قَالَ سُبْحَانَ اللَّهِ وَبِحَمْدِهِ فِي يَوْمٍ مِائَةَ مَرَّةٍ حُطَّتْ عَنْهُ خَطَايَاهُ وَإِنْ كَانَتْ مِثْلَ زَبَدِ الْبَحْرِ