It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "In Paradise there are upper chambers whose outside can be seen from their inside and whose inside can be seen from their outside." Abu Malik al-Ash'ari (may Allah be pleased with him) said: For whom are they, O Messenger of Allah? He (peace and blessings be upon him) said: "For those who speak gently, feed others, and spend the night standing in prayer while people are asleep."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13700