Sayyiduna Jabir bin Abdullah narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever among you fears that he will not be able to wake up in the last part of the night, then he should offer Witr at the beginning of the night and go to sleep. And whoever among you hopes to wake up in the last part of the night, then he should offer Witr in the last part, for indeed, the angels are present in the prayer of the last part of the night, and it is more virtuous." This is the narration of Isa. In the narration of Jarir and Abu Awanah, these words are present: "I heard the Prophet (peace and blessings of Allah be upon him)."