Hazrat Riyah bin Harith narrates that I was with Hazrat Ammar bin Yasir in the Battle of Siffin, my knees were touching his knees. A man said that the people of Syria have committed disbelief. Hazrat Ammar said, "Do not say this. Their and our Prophet is one, their and our Qibla is one. They are afflicted by tribulation, they have turned away from the truth. It is obligatory upon us to fight them so that they may return to the truth."