Musnad Ahmad 1034:95

Husayn ibn Muhammad narrated to us, Shayban narrated to us, from Mansur, from Rib'i ibn Hirash, who said: I was at the funeral of Hudhayfah, and a man from the people said: I heard this one—meaning Hudhayfah—say: "There is no harm upon me in what I heard from the Messenger of Allah, may Allah bless him and grant him peace: 'And if you fight one another, I shall look for the furthest room in my house and I shall enter it. And if he enters upon me, I shall say: Behold, bear my sin and your sin, or my offense and your offense.'"