Musannaf Ibn Abi Shayba 38:81

Yahya ibn Adam narrated to us, he said: Zayd ibn Abd al-Aziz narrated to us, from his father, from Habib ibn Abi Thabit, who said: I saw—or it was Yahya’s doubt—a banner on the day of Siffin with Hashim ibn Utbah, and he was a one-eyed man. Ammar charged toward him, saying: "Advance, O one-eyed man! There is no good in a one-eyed man who does not come to the panic and feel ashamed, so he advances." He said: Amr ibn al-Aas said: "I truly see from the bearer of the black banner an action; if he continues in what I see, the Arabs will surely be annihilated today." He said: Abu al-Yaqzan [Ammar] did not cease to rally them. He said: And he was saying: "Every water is a watering place, and the waters are [to be] sought. Patience, servants of God! Paradise is under the shadows of the swords."