Mukhtasar Muslim

´Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that` he (peace be upon him) said: Whoever says (Subhan Allah) 33 times, (Alhamdulillah) 33 times, and (Allahu Akbar) 33 times after every prayer, these will be ninety-nine words, and completes one hundred by saying once (”La ilaha illallah wahdahu la sharika lahu, lahul mulk wa lahul hamd wa huwa ‘ala kulli shay’in qadeer”), meaning “There is no deity worthy of worship except Allah, He is alone, He has no partner, His is the dominion and for Him is all praise, and He is over all things competent,” then his sins will be forgiven even if they are as much as the foam of the sea (i.e., countless).