Why do Shias beat upon themselves on 9/10 muharram

Re: Why do Shias beat upon themselves on 9/10 muharram

I asked for source buddy…if u dont have any ask ALLAH for forgivness for lieng on ALLAHS name.
My question abt eitkaf is still in ur head, go back to thread and read again. I dunt have a dinsours brain to argue with follower of Mahviya.