Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (صلى الله عليه وسلم) said, “He who recites in the morning and in the evening the statement: ‘Subhan-Allahi wa bihamdihi (Allah is free from imperfection and I begin with praising Him)’ one hundred times, will not be surpassed on the Day of Resurrection by anyone with better deeds than one who utters the same words or utters more of these words.” [Muslim]
وعن أبي هريرة رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: “من قال حين يصبح وحين يمسي: سبحان الله وبحمده مائة مرة، لم يأتِ أحد يوم القيامة بأفضل مما جاء به، إلا أحد قال مثل ما قال أو زاد” (( رواه مسلم)).
Sunnah.com reference : Book 16, Hadith 44
Arabic/English book reference : Book 16, Hadith 1451
Precious Rewards 