Namaz is best. Exercise Mohammed (SallAllah o Alehi Wassalam) Says:
Fajr - Increases Completion
Zohr - Increases Income
Asr - Improves Health
Magrib - Good Future
Isha - Peaceful sleep
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“Repeat often ‘La hawla wa laa quwwata illa billah (there is no power or strength except with Allah)’, for it is from the treasure of Paradise.”