Musnad Ahmad

It is narrated from Hazrat Fatimah bint Qais (may Allah be pleased with her) that once the Prophet (peace and blessings be upon him) came out and led the Zuhr prayer. When the Messenger of Allah (peace and blessings be upon him) completed his prayer, he said, "Remain seated!" (He, peace and blessings be upon him) ascended the pulpit. The people were surprised, so he said: "O people! Remain seated in your place of prayer! I have not gathered you to encourage you towards something or to warn you from Allah. I have only gathered you because Tamim Dari came to me, pledged allegiance to Islam, and became Muslim, and he told me something: He and his paternal cousins boarded a sea vessel, and suddenly a storm arose in the sea. They reached an unknown island in the sea until the sun set. Then they entered the island in small boats, and there they met an animal covered with thick and dense hair. They could not tell whether it was male or female. They greeted it with salam, and it replied. They asked, 'Who are you?' It said, 'O people! Go to that man in the monastery, for he is very eager to know about you.' We asked it, 'Who are you?' It replied, 'I am Jassasah.' So they went on until they entered the monastery, where there was a man bound with great severity. He asked, 'Who are you?' They said, 'We are people from Arabia.' He asked, 'What has become of the people of Arabia? Has their Prophet appeared?' They said, 'Yes!' He asked, 'What did the people of Arabia do?' They replied, 'They did well, believed in him, and affirmed him.' He said, 'They did well.' Then he asked, 'What has become of the people of Persia? Have they prevailed over them?' They said, 'They have not yet prevailed over the people of Persia.' He said, 'Know that soon they will prevail over them.' He said, 'Tell me about the spring of Zughar.' We said, 'It has abundant water, and the people there farm with its water.' Then he said, 'What has become of the date palms of Baisan? Have they started bearing fruit?' They said, 'Its early part has started to bear fruit.' At this, he jumped so much that we thought he would attack us. We asked him, 'Who are you?' He said, 'I am the Messiah (Dajjal). Soon I will be permitted to come out. When I come out, I will travel the earth and descend upon every town in forty nights, except for Makkah and Taybah, for entering them has been made forbidden for me.'" The Prophet (peace and blessings be upon him) said: "O Muslims! Rejoice, for Taybah is this Madinah. Dajjal will not be able to enter it."