The Book Pertaining to the Excellent Qualities of the Holy Prophet (may Peace be upon them) and His Companions (Kitab Al-Fada'il)
Muslim :: Book 30 : Hadith 5670
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The similitude of mine and that of my Umma is that of a person who lit fire and there began to fall into it insects and moths. And I am there to hold you back, but you plunge into it.