Abu Hurairah (RadhiAllahu 'anhu) reported:
The Messenger of Allah (sallallahu alayhi wa sallam) 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]