Sunan At-Tirmidhi

Ali narrated that the Messenger of Allah said:""Indeed in Paradise there are chambers, whose outside can be seen from their inside, and their inside can be seen from their outside."" A Bedouin stood and said : 'Who are they for, O Messenger 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