Muhammad bin 'Ali bin 'Abdullah bin ‘Abbas (رضي الله عنه) narrated that his father said:

Ibn ‘Abbas (رضي الله عنه) told me that he stayed overnight with the Prophet (ﷺ). He woke up at night, took his siwak and brushed his teeth with it, then he did wudoo’, saying, “Verily, in the creation of the heavens and the earth... " (Al 'Imran 3:190) until he finished reciting these verses, and reached the end of the soorah. Then he prayed two rak'ahs, in which he made the standing, bowing and prostrating lengthy. Then he went (and lay down) until I could hear him breathing deeply in sleep. Then he woke up, cleaned his teeth with the siwak and did wudoo’ whilst saying... until he had done that three times. Then he prayed Witr with three rak'ahs, then Bilal the mu'adhdhin came to him and he went out to the prayer, saying, "O Allah, put in my heart light, put in my hearing light, put in my sight light, put in front of me light and behind me light, put to my right light and to my left light, above me light and below me light, O Allah, grant me abundant light.”