Ash'ath bin Abi al-Sha'tha (may Allah have mercy on him) narrates from his father: The Dajjal was mentioned in the presence of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), and he said: "Do not mention him much, for when a matter is decreed in the heaven, the quickest thing for its descent to the earth is that it appears on the tongues of the people." He also said: "How will it be with you when the people are safe and you are afraid? And how will it be with you when the people are in the shade and you are in the sun?"
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8478