Hudhaifa reported Allah's Messenger (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ) as saying: the Dajjal would have with him water and fire and his fire would have the effect of cold water and his water would have the effect of fire, so don't put yourself to ruin. Abu Mas'ud reported: I also heard it from Allah's Messenger (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ).