Sunan Abi Dawud Book 5, Hadith 99
He used to lead the people in the 'Isha prayer and return to his family and pray four rak'ahs and go to his bed. The narrator then transmitted the tradition in full. This version does not mention the words: "During them (the rak'ahs) he equated all the recitation of the Qur'an, bowing and recitation." This also does not mention the words about the salutation: "Till he almost awakened us."
He (the Prophet) would offer the night prayer and go to his bed. In this version there is no mention of praying four rak'ahs. The narrator then transmitted the rest of the tradition. This version further says: He would pray eight rak'ahs during which his recitation of the Qur'an, bowing and prostration were all equal. He would sit only after the eight rak'ah, and then stand up without uttering the salutation, and pray one rak'ah observing witr prayer and then give the salutation raising his voice so much so that we were about to awake. The narrator then transmitted the tradition to the same effect.
This tradition has also been transmitted by 'Aishah through a different chain of narrators. But the tradition narrated by Hammad b. Salamah is not equal to the tradition narrated by others.