Musnad Abu Ya'la al-Mawsili 152:226

Abu Khaythama narrated to us, Yazid bin Harun narrated to us, al-Awwam bin Hawshab informed me, Jabala bin Suhaym narrated to me, from Mu'athir bin 'Affara, from Abdullah, who said: When it was the night the Prophet, may Allah bless him and grant him peace, was taken on the Night Journey, he met Ibrahim, Musa, and Isa, may the blessings of Allah be upon them. They discussed the Hour: when it would be. They began with Ibrahim and asked him about it, but he had no knowledge of it. They asked Musa, but he had no knowledge of it. They referred the discussion to Isa, who said: "Allah has made a covenant with me regarding what is before its occurrence, but as for its occurrence, no one knows it except Allah." He then mentioned the emergence of the Dajjal. He said: "I will descend and kill him. Then the people will return to their lands, and they will be met by Ya'juj and Ma'juj, who will descend from every elevated place. They will not pass by any water without drinking it, and they will not pass by anything without corrupting it. They will cry out to me, so I will supplicate to Allah, and He will cause them to die, until the earth will stink from their stench. Then I will supplicate to Allah to send the sky, which will carry their bodies and cast them into the sea. Then the mountains will be leveled, and the earth will be stretched out like the stretching of leather." "Allah, Blessed and Exalted is He, made a covenant with me that when that happens, the Hour will be for the people like a pregnant woman at full term; her family does not know when she will surprise them with her labor, by night or by day." Al-Awwam said: I found the confirmation of that in the Book of Allah. Then he recited: "Until when Ya'juj and Ma'juj are let loose..." [up to the end of the verse].