The Invasion of Buhran occurred in 3 A.H of the Islamic calendar of the 4th or 5th month.
[1] A report had arrived to the Muslims that a formidable force of the Banu Sulaym from Buhran were advancing on Madinah.
[2] Muhammad, took 300 men, to Hijaz reaching to Buhran, where the Banu Sulaym fled in panic.
The expedition is regarded as a "patrolling invasion", according to Muslim scholar Saifur Rahman al-Mubarakpuri.
[3] This event is mentioned in Ibn Hisham's biography of Muhammad and modern Islamic sources such as Ar-Raheeq Al-Makhtum by Saifur Rahman Al-Mubarakpuri.