1727. Narrated Aboo Huraira (radhi Allaahu anhu) : The Prophet (Sallallaahu Alaihi Wasallam) said,
There are two expressions which are very easy for the tongue to say, but they are very heavy in the balance (of deeds) and are very dear to the Beneficent (Allaah), and they are, ‘Subhaan Allaahi Al-Azeem and Subhaan Allaahi wa bihamdihi.(*)’ “
(*) [H. 1727] see the footnote of Hadeeth No. 1725.
[Saheeh Al-Bukhaari, Hadeeth No. 415, Vol. 8]
Source : The Book of Dhikr, Ad-Du’aa At-Tauba etc – Chapter 10 -The superiority of Tahleel (Saying: Laa ilaaha ill-Allaah) tasbeeh (Saying : Subhan Allaah) and to invoke Allaah (Subhahanu wata’alaa). Al-Lulu Wal-Marjan,Compiled by : Fuwad Abdul-Baqi,Translated by : Dr. Muhammad Muhsin Khan