Ibn ‘Abbas said

I spent a night with my maternal aunt Maimuna when the Prophet (ﷺ) was with her. After talking to his family for a time he had a sleep, then when the last third of the night came, or a little later, he sat up, looked at the sky, and recited, “In the creation of the heavens and the earth and the alternation of night and day there are indeed signs for people of understanding,"(Al-Qur’an; 3:190) to the end of the sura. Then getting up and going to the bucket, he loosened its cord and poured some water into a bowl, then performed a good ablution between the two extremes, not going to great length, and when he had done it fully he stood up and prayed. I got up, and when I had performed ablution I stood at his left side, whereupon he took me by the ear and made me go round to his right side. His prayer was altogether thirteen rak'as. Then he lay down and slept, and he snored as was his custom. When Bilal made the call to prayer for him he prayed without performing ablution, and his supplication included these words, “O Allah, place light in my heart, light in my eyesight, light in my hearing, light on my right hand, light on my left hand, light above me, light below me, light in front of me, light behind me, and grant me light." Some added, “and light in my tongue," and mentioned, “my joints, my flesh, my blood, my hair, my skin." (Bukhari and Muslim.) In a version by both of them he said, “Place light in my soul, and give me abundant light." In another by Muslim he said, “O Allah, give me light."