Musnad Abu Ya'la al-Mawsili 133:15

Hadaba ibn Khalid narrated to us, Hammad narrated to us, Ali ibn Zayd narrated to us, from Anas ibn Malik, that the Messenger of Allah (may Allah bless him and grant him peace) said: "On the night I was taken on the Night Journey, I came upon men whose lips were being clipped with scissors of fire. I said, 'Who are these, O Gabriel?' He said, 'These are the preachers of your nation; they command people to righteousness and forget themselves, while they recite the Book. Do they not then use their reason?'"