The Messenger of Allah ﷺ said, "In Paradise there is a chamber whose outside can be seen from within, and whose inside can be seen from without."Abu Musa Ashari asked, "For whom is it, Messenger of Allah?"He replied, "For the one who speaks gently, feeds others, and spends the night standing in prayer while people are asleep."
أن رسول الله ﷺ قال: إن في الجنة غرفة يرى ظاهرها من باطنها، وباطنها من ظاهرها. فقال أبو موسى الأشعري: لمن هي يا رسول الله؟ قال: لمن ألان الكلام، وأطعم الطعام، وبات الله قائما والناس نيام.
Imam Ahmad narrated it (6615) from Hasan, who said, Ibn Lahia narrated to us, who said, Huyayy bin Abdullah narrated to me, from Abu Abdul-Rahman Hubli, from Abdullah bin Amr, and he mentioned it. There is well-known discussion about Ibn Lahia, but he has been corroborated.Hakim narrated it (1/321) via Ibn Wahb, from Huyayy bin Abdullah, with this same chain.Huyayy bin Abdullah is Ibn Shurayh Al-Maafiri, about whom there is disagreement, though his hadith is hasan, especially as corroborating evidence. The discussion about him is set out in detail in the book on prayer.