SHAFAQNA – It is narrated from Imam Hassan Askari (AS) who said: Five signs of the believer are: To perform 51 Rok’ats of Salaat (per day/per 24 hours; including Wajib as well as Mostahab Salaats), Ziarat Arbaeen, wearing ring on the right hand, placing forehead (to prostrate) on the (natural) soil, and say “Besmellah-e-Rahman-e-Rahim, loudly in Salaats . Imam Askari (AS) ties the survival of Islam, particularly Shia Islam to Ziarat Arbaeen, because the movement of Imam Hussain (AS) was the cause of the revival of Islam and Shia Islam. Imam Askari (AS) wanted all the slogans and aims of Imam Hussain (AS) to remain alive; therefore, he mentioned these signs for the believer.
 Wasaelul Shia, Vol. 10, Page 373 & many other authentic references.