Musnad Ahmad 1526

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: "There was no Prophet (ﷺ) who did not describe the Dajjal to his ummah, but I will describe him in a way that no one before me described him: He is one-eyed and Allah, may He be glorified and exalted, is not one eyed.”