Musnad Ahmad Hadith 2554

I stayed overnight in the house of my maternal aunt Maimoonah, and I watched to see how the Messenger of Allah (ﷺ) would pray. He got up, urinated, then washed his face and hands, then he slept. Then he got up and went to a waterskin, undid its straps, and poured some water into a bowl or vessel. He tipped it towards himself with his hand and did a good wudoo’, not using too much or too little water. Then I came and stood beside him, and stood on his left. He took hold of me and made me stand on his right. The prayer of the Messenger of Allah (ﷺ) included thirteen rak'ahs, then he slept until he was breathing deeply. We knew that he was sleeping when he breathed deeply. Then he went out to pray, and he prayed, and said in his prayer or in his prostration: "O Allah, put in my heart light, in my hearing light, in my seeing light, to my right light, to my left light, in front of me light, behind me light, above me light, below me light, make me light - or Shu'bah said: give me light." 'Umar bin Deenar narrated from Kuraib, from Ibn 'Abbas (رضي الله عنه) that he slept lying on his side.