SHAFAQNA – It is narrated from Imam Sadeq (AS) who said: We do not consider a person to be a believer unless he/she follows and practices our commands (the commands of Ahlul Bait (AS)) willingly. Be aware that piety is needed to follow us and practice our commands. Therefore acquire piety for yourself in order that Allah (SWT) has mercy on you, and deceives and defeats our enemies by means of piety, in order that God bestows dignity on you .
 Wasaelul Shia, Vol. 15, Page 243.