SHAFAQNA – Imam Hussain (AS) said: A group of people pray to God for divine rewards and paradise and this is the traders and merchants prayer. Another group pray to the Almighty for fear of hell fire and divine punishments and this is the slave’s prayer. A group of people pray to Allah (SWT) because God is worthy of being worshipped and give thanks for all divine blessings, this is the prayer of free people and the best of prayers .
 Beharul Anwaar, Vol. 75, Page 113.