Sahih Muslim | Book 41 | Hadith Number 7011

Narrated by Hudhaifa
Hudhaifa reported Allah's Messenger (may peace be upon him) as saying: the Dajjal would have with him water and fire and his fire would bays 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 (may peace be upon him).