Musnad Ahmad 1578

It was narrated from Dawood bin ‘Amir bin Sa"d bin Malik, from his father, that his grandfather said: The Messenger of Allah (ﷺ) said: "I shall certainly describe the Dajjal in a way in which no one before me described him. He is one eyed and Allah, may He be glorified and exalted, is not one eyed.”