Musannaf Ibn Abi Shaybah 31200 — A man who wakes at night: what

Al-Qasim bin Abd al-Rahman said that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "Whoever wakes up during the night and then says these words: 'There is no one worthy of worship except You. My Lord, I have wronged myself, so forgive me,' will come out of his sins, pure and clean, just as a snake comes out of its slough."