The Book of Poetry (Kitab Al-Sh`ir)
Muslim :: Book 28 : Hadith 5611
Abu Sa`id Khudri reported: We were going with Allah's Messenger (may peace be upon him). As we reached the place (known as) Arj there met (us) a poet who had been reciting poetry. Thereupon Allah's Messanger (may peace be upon him) said: Catch the satan or detain the satan, for filling the belly of a man with pus is betting than stuffing his brain with poetry.