A group from Banu Tamim came to the Prophet . Abu Bakr said: "Appoint Al-Qa'qa' bin Ma'bad (as commander or governor)," and 'Umar said: "No, (appoint) Al-Aqra' bin Habis." They argued until they began to raise their voices, then the words were revealed: "O you who believe! Make not (a decision) in advance before Allah and His Messenger..." until the end of the Verse: "And if they had patience till you could come out to them, it would have been better for them."
Sunan an-Nasa'i Book 49, Hadith 8