Sahih Bukhari Volume 9, Book 92, Hadith 7124

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنِي قَيْسٌ، قَالَ قَالَ لِي الْمُغِيرَةُ بْنُ شُعْبَةَ مَا سَأَلَ أَحَدٌ النَّبِيَّ صلى الله عليه وسلم عَنِ الدَّجَّالِ مَا سَأَلْتُهُ وَإِنَّهُ قَالَ لِي ‏"‏ مَا يَضُرُّكَ مِنْهُ ‏"‏‏.‏ قُلْتُ لأَنَّهُمْ يَقُولُونَ إِنَّ مَعَهُ جَبَلَ خُبْزٍ وَنَهَرَ مَاءٍ‏.‏ قَالَ ‏"‏ هُوَ أَهْوَنُ عَلَى اللَّهِ مِنْ ذَلِكَ ‏"‏‏

Narrated By Al-Mughira bin Shu'ba : Nobody asked the Prophet as many questions as I asked regarding Ad-Dajjal. The Prophet said to me, "What worries you about him?" I said, "Because the people say that he will have a mountain of bread and a river of water with him (i.e. he will have abundance of food and water)" The Prophet said, "Nay, he is too mean to be allowed such a thing by Allah"' (but it is only to test mankind whether they believe in Allah or in Ad-Dajjal.)