He was nearly killed at the Battle of Mišar (August 1806), but was instrumental in the victory; Karađorđe ordered Lazarević to hide in the woods with cavalry, and on the sound of his cannon, charge into the rear of the Ottoman troops. In the midst of battle, Lazarević challenged Ottoman Bosnian commander Mehmed-beg Kulenović to a duel who came out as the winner, Mehmed-beg Kulenović was then killed from a pre-set ambush by Serbian insurgents who accompanied Lazarević who managed to escape into the woods. The destroyed Ottoman army retreated towards Šabac, while Lazarević was sent to Provačka Ada for treatment.