Ali narrated that the Messenger of Allah (s.a.w) said:"Indeed in Paradise there are chambers whose outside can be seen from their inside, and their inside can be seen fom their outside." A Bedouin stood and said: "Who are they for O Prophet of Allah?" he said: "For those who speak well, feed others, fast regularly, and perform Salat for Allah during the night while the people sleep

English translation · Jami' at-Tirmidhi