Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (sallallahu 'alaihi wa sallam) 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].


وعن أبي هريرة رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "كلمتان خفيفتان على اللسان، ثقيلتان في الميزان، حبيبتان إلى الرحمن: سبحان الله وبحمده، سبحان الله العظيم" ((متفق عليه)).

16 of Riyad as-Salihin,
Sunnah.com reference
: Book 16, Hadith 1