Chapter 1: The Book of the Sunnah
It was narrated from Jabir bin 'Abdullah that: The Prophet said: "Do not seek knowledge in order to show off in front of the scholars, or to argue with the foolish, and do not choose the best seat in a gathering, due to it (i. e. the knowledge which you have learned) for whoever does that, the Fire, the Fire (awaits him)."
Sunan Ibn Majah 254