It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him); he said: On the day of Hunayn the people fled from the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "I am the Prophet, no lie; I am the son of Abd al-Muttalib."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5035