SHAFAQNA – It is narrated from Imam Ali (AS) who said: One day the Prophet of Islam (PBUH) was crying loudly, Imam Hussain (AS) asked why are you crying? The Prophet (PBUH) replied: Jabrail (AS) informed me that you will be killed and your graves will be spread all over. Imam Hussain (AS) asked: What will be the reward for those who visit (Ziarat) our shrines? The Prophet (PBUH) replied: My son, they are part of my Ummah (nation) who visit you and they seek blessings with that visit. It is on me that on the Day of Judgment go to them and save them from the freights of that day .
 Wasaelul Shia, Vol. 10, page 259.