`Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: Cover the vessels and tie the water skins, for there is a night in the year in which a plague descends. Then, whatever uncovered vessel or untied water skin it finds, the plague descends into it. And in one narration, Laith (the narrator) said that among us, in non-Arab lands, people avoid this in "Kanun Awwal" (that is, December).