Musnad Ahmad 26:184

Ishaq narrated to us, Sufyan narrated to us, from Mansur, from Rib'i ibn Hirash, from al-Bara' ibn Najiyah al-Kahili, from Ibn Mas'ud, from the Prophet, may Allah bless him and grant him peace, the like of it, except that he said: Umar said to him: "O Messenger of Allah, what has passed, or what remains?" He said: "What remains."