Musannaf Ibn Abi Shayba 36:462

Ubayd Allah ibn Musa narrated to us, he said: Musa ibn Ubaydah informed us, from Abdullah ibn Ubaydah, that Abu Sufyan, Hakim ibn Hizam, and Safwan ibn Umayyah went out on the day of Hunayn to see who the defeat would be upon. A Bedouin passed by them, and they said: "O servant of Allah, what have the people done?" He said: "Muhammad will face it forever." He said: "And likewise when his companions dispersed from him." Some of them said to others: "A lord from Quraysh is more beloved to us than the lord of the Bedouins. O so-and-so, go and bring us the news for a companion of theirs." He said: So he went until he was among the people, and he heard them saying: "O for the Aws! O for the Khazraj!" And they had overcome the people, and the slogan of the Prophet, may Allah bless him and grant him peace, was...