Abul-Mutawakkil narrated that Ibn 'Abbas (رضي الله عنه) narrated that

He stayed overnight with the Prophet of Allah (ﷺ) one night. The Prophet (ﷺ) of Allah got up at night, and went out and looked at the sky, then he recited this verse from Al ‘Imran: “Verily, in the creation of the heavens and the earth, and in the alternation of night and day - up to glory to - You! (Exalted are You above all that they associate with You as partners). Give us salvation from the torment of the Fire" (Al 'Imran 3:190, 191). Then he went back to the house and cleaned his teeth with the siwak and did wudoo’, then he got up and prayed, then he lay down. Then he got up again and looked at the sky, then he recited this verse; then he went back and cleaned his teeth with the siwak and did wudoo’, then he got up and prayed, then he lay down. Then he went again and looked at the sky, then he recited this verse, then he went back and cleaned his teeth with the siwak and did wudoo’, then he got up and prayed.