Syedna Ibn Abbas (may Allah be pleased with them) narrates that the Noble Prophet (peace and blessings be upon him) said: There is no contagious disease, no bad omen, no (evil in) Safar, and no reality in the owl. Simak narrates that by Safar is meant a worm that is produced in the human stomach. A man said: O Messenger of Allah! Among a hundred camels, if one camel gets mange, then because of it all become mangy. The Noble Prophet (peace and blessings be upon him) said: Well, tell me first, who caused the first one to become sick?