Kurayb (may Allah have mercy on him) says: I asked Ibn Abbas (may Allah be pleased with them both): What was the night prayer of the Messenger of Allah (peace and blessings be upon him) like? He said: He (peace and blessings be upon him) would recite in one of his chambers, and whoever was outside would hear it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4699