Abu Hurairah (RAA) narrated that the Messenger of Allah (ﷺ) said:

“Whoever says a hundred times, ‘How perfect Allah is and I praise Him,’ his sins will be forgiven though they may be as much as the foam of the sea.” Agreed upon.

وَعَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ مَنْ قَالَ: سُبْحَانَ اَللَّهِ وَبِحَمْدِهِ مِائَةَ مَرَّةٍ حُطَّتْ خَطَايَاهُ, وَإِنْ كَانَتْ مِثْلَ زَبَدِ اَلْبَحْرِ } مُتَّفَقٌ عَلَيْهِ .‏ [1]‏ .‏