Sunan Abi Dawud Book 5, Hadith 54
Shurayh ibn Hani said: I asked Aisha about the prayer of the Messenger of Allah (ﷺ). She said: The Messenger of Allah (ﷺ) never offered the night prayer and thereafter came to me but he offered four or six rak'ahs of prayer. One night the rain fell, so we spread a piece of leather (for his prayer), and now I see as if there is a hole in it from which the water is flowing. I never saw him protecting his clothes from the earth (as he did on that occasion).
This tradition from the Prophet (ﷺ) without mentioning the name of the Companion in the chain (in the mursal form).
Abu dawud said: I heard Muhammad b. Humaid say: I heard Ya'qub say: Anything I narrated to you from Ja'far on the authority of Sa'id b. Jubair from the Prophet (ﷺ) is directly coming from Ibn Abbas from the Prophet (ﷺ).
In Surat al-Muzzammil (73), the verse: "Keep vigil at night but a little, a half thereof" (2-3) has been abrogated by the following verse: "He knoweth that ye count it not, and turneth unto you in mercy. Recite then of the Qur'an that which is easy for you" (v.20). The phrase "the vigil of the night" (nashi'at al-layl) means the early hours of the night. They (the companions) would pray (the tahajjud prayer) in the early hours of the night.
He (Ibn Abbas) says: It is advisable to offer the prayer at night (tahajjud), prescribed by Allah for you (in the early hours of the night). This is because when a person sleeps, he does not know when he will awake. The words "speech more certain" (aqwamu qilan) means that this time is more suitable for the understanding of the Qur'an. He says: The verse: "Lo, thou hast by day a chain of business" (v.7) means engagement for long periods (in the day's work).