Musannaf Ibn Abi Shayba 23:84

Muhammad ibn Bishr narrated to us, he said: Muhammad ibn ‘Amr narrated to us, from Abu Salamah, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Modesty is from faith, and faith is in Paradise. And obscenity is from coarseness, and coarseness is in the Fire."