The angel who came to Allah’s Messenger (s.a.w.s.) and informed him about the martyrdom of Imam Husain (a.s.) was the angel of the oceans. An angel of Paradise flew down to an ocean, with his wings spread out over the ocean crying: “O folks of the oceans! Put on the garments of grief, for the son of Allahs Messenger (s.a.w.s.) will be slaughtered.” Then he carried some dust of Imam Husain (a.s.) in his wings to the heavens. There was no angel that did not smell it and was not affected by it and they cursed the killers of Husain (a.s.) and their followers. (Kamil al-Ziyrat h. #3)