The Messenger of Allah ﷺ mentioned the Dajjal and said, "One of his eyes looks like a piece of green glass. Seek refuge in Allah from the punishment of the grave."
أن رسول الله ﷺ ذكر الدجال، فقال: إحدى عينيه كأنها زجاجة خضراء، وتعوذوا بالله تبارك وتعالى من عذاب القبر.
Ahmad narrated it (21145–21147), and this is his wording, as did Bukhari in Tarikh al-Kabir (5/78–79), and Ibn Hibban graded it sahih (6795), all of them through routes from Shubah, from Habib bin Zubayr, who said, I heard Abdullah bin Abu Huzayl, from Abdul-Rahman bin Abza, from Abdullah bin Khabab, from Ubayy bin Kaab, who narrated it. Its chain of transmission is sahih, and Abdullah bin Khabab is Ibn Arat, the Madinan.