The Messenger of Allah ﷺ said, "Whoever glorifies Allah at the end of every prayer thirty-three times, praises Allah thirty-three times, and magnifies Allah thirty-three times, that makes ninety-nine, and completes the hundred by saying, 'There is no god but Allah alone, with no partner. To Him belongs the dominion, and to Him belongs all praise, and He has power over all things,' his sins will be forgiven, even if they are like the foam of the sea."
حدثني عبد الحميد بن بيان الواسطي أخبرنا خالد بن عبد الله عن سهيل عن أبي عبيد المذحجي قال مسلم أبو عبيد مولى سليمان بن عبد الملك عن عطاء بن يزيد الليثي
عن رسول الله ﷺ من سبح الله في دبر كل صلاة ثلاثا وثلاثين وحمد الله ثلاثا وثلاثين وكبر الله ثلاثا وثلاثين فتلك تسعة وتسعون وقال تمام المائة لا إله إلا الله وحده لا شريك له له الملك وله الحمد وهو على كل شيء قدير غفرت خطاياه وإن كانت مثل زبد البحر
27 - Muslim narrated the hadith of Suhayl bin Abu Salih, from Abu Ubayd the doorkeeper, from Ata, from Abu Hurairah, from the Prophet, peace and blessings be upon him, "Whoever glorifies Allah thirty-three times after every prayer, and praises Him and magnifies Him." He said, Malik has contradicted Suhayl, narrating it from Abu Ubayd, from Ata, from Abu Hurairah, as a stopped report.