It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The Dajjal will emerge at a time when religion will be weak and knowledge will be taken away. At that time, the Dajjal will appear. He will remain for forty days; one of those days will be like a year, one day will be like a month, and one day will be like a week, and the remaining days will be like ordinary days.