Small good deed greater reward: Forgiveness of sins

The Prophet (Sal-Allahu Alaihi Wasallam) said

*If anyone say after every prayer*
*33 times SubhanALLAH,*

*33 times Alhamdulillah,*

*33 times Allahu Akbar,*

*ninety-nine times in all, and says (1 time)to complete a hundred*

لا اِلهَ اِلَّا اللّهُ وَحْدَهُ لا شَرِيكَ لَهُ ، لَهُ الْمُلْكُ وَ لَهُ الْحَمْدُ وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ

La ilaha illal-lah wahdahu la sharika lahu, lahu-l-mulk wa lahu-l-hamd wa huwa Ala kulli shayin qadir

*his sins will be forgiven even If these are equal to the foam of the sea.*

(Sahih Muslim, Book 4, 1243)