Crying While Praying

 Ishaq Ibne Ammar reports: I said to Imam Sadeq (AS):  I recite Dua and I wish I could weep, but tears do not come to my eyes.  However when I remember a relative who has died, my heart is broken and my tear starts running.  Is it something permissible?   Imam Sadeq (AS) said: *        * “Yes, it is: Remember the deceased and when your heart is broken weep for God’s  sake.” Reference : Oddatud Daee