Abdullah bin Abi Qais (may Allah have mercy on him) says that I asked Hazrat Aisha (may Allah be pleased with her), "Tell me, did the Prophet (peace and blessings be upon him) perform ghusl (ritual bath) for janabah before sleeping or after sleeping?" She replied, "Sometimes he would perform ghusl before sleeping and sometimes after sleeping." Then I asked, "Tell me, did the Prophet (peace and blessings be upon him) recite aloud (jahr) or silently (sirri)?" She replied, "Sometimes aloud and sometimes silently."