This incident is narrated in Ghaybat Kubra from Abul Husayn bin Abul Baghl Katib who says, I took on a duty from Abu Mansur Ibne Salihan and then something happened between me and him that caused me to go into hiding. Abu Mansur asked for me and threatened me. I waited in hiding with fear and then went to the graveyard of Quraysh in Baghdad on a Thursday night (Shabe Jumuah). I intended to spend...