Samura ibn Jundab reported that the Prophet(peace be upon him)said,
"The dearest phrases to Allah are four:
Subhan Allah, (Glorified is Allah),
al-Hamdulillah (All praise be to Allah),
la ilaha ill-Allah (There is no God but Allah), and
Allah-o-Akbar (Allah is the Greatest).
There is no harm in beginning them in any order you choose
while remembering Allah.'' ....................................(Muslim)
