The Book of Remembering ALLAH

Riyad as-Salihin, The Book of the Remembrance of Allah
Book 16, Hadith 1408
Narrated 'Abu Hurairah (ra):
The Messenger of Allah (pbuh) said, "There are two statements that are light for the tongue to remember, heavy in the Scales and are dear to the Merciful: 'Subhan-Allahi wa bihamdihi, Subhan-Allahil-Azim [Glory be to Allah and His is the praise, (and) Allah, the Greatest is free from imperfection]'."[Al-Bukhari and Muslim].

Riyad as-Salihin, The Book of the Remembrance of Allah
Book 16, Hadith 1409
Narrated 'Abu Hurairah (ra):
The Messenger of Allah (pbuh) said, "The uttering of the words: "Subhan-Allah (Allah is free from imperfection), Al-hamdu lillah (all praise is due to Allah), La ilaha illallah (there is no true god except Allah) and Allahu Akbar (Allah is the Greatest)' is dearer to me than anything over which the sun rises."[Muslim].

Riyad as-Salihin, The Book of the Remembrance of Allah
Book 16, Hadith 1410
Narrated 'Abu Hurairah (ra):
The Messenger of Allah (pbuh) said, "He who utters a hundred times in a day these words: 'La ilaha illallahu, wahdahu la sharika lahu, lahul-mulku wa lahul-hamdu, wa Huwa 'ala kulli sha'in Qadir (there is no true god except Allah. He is One and He has no partner with Him; His is the sovereignty and His is the praise, and He is Omnipotent),' he will have a reward equivalent to that for emancipating ten slaves, a hundred good deeds will be recorded to his credit, hundred of his sins will be blotted out from his scroll, and he will be safeguarded against the devil on that day till the evening; and no one will exceed him in doing more excellent good deeds except someone who has recited these words more often than him. And he who utters: 'Subhan-Allahi wa bihamdihi (Allah is free from imperfection and His is the praise)' one hundred times a day, his sins will be obliterated even if they are equal to the extent of the foam of the ocean."[Al-Bukhari and Muslim].