I said to Huzaifa bin Yaman, "Tell me what you heard from the Messenger of Allah ﷺ about Dajjal."He said, "Dajjal will emerge, and with him will be water and fire. What people see as water will actually be a burning fire, and what people see as fire will actually be cool, sweet water. So whoever among you witnesses that, let him plunge into what appears to be fire, for it is sweet, wholesome water."Uqba said, "I too heard this, confirming what Huzaifa reported."
قلت لحذيفة بن اليمان: حدثني ما سمعت من رسول الله ﷺ في الدجال قال: إن الدجال يخرج، وإن معه ماءا ونارا، فأما الذي يراه الناس ماءا، فنار تحرق، وأما الذي يراه الناس نارا، فماء بارد عذب، فمن أدرك ذلك منكم فليقع في الذي يراه نارا، فإنه ماء عذب طيب. فقال عقبة: وأنا قد سمعته تصديقا لحذيفة.
Bukhari narrated it in the Book of Prophets (3450), and Muslim in the Book of Tribulations (2934-2935), both through Abdul-Malik bin Umayr, from Rabi bin Harash, who mentioned it. Uqbah bin Amr al-Ansari is the one known as Abu Masud al-Badri.