Sayyiduna Jabir (may Allah be pleased with him) said: I saw the Messenger of Allah (peace and blessings be upon him) during his Hajj on the day of Arafah, riding his she-camel al-Qaswa', and he delivered a sermon. I heard him say: "O people, I have left among you that which, if you hold fast to it, you will never go astray: the Book of Allah and my 'itrah (kin), my household."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2667