Abdullah bin Abi Bakr bin Muh. b. 'Amr عبد الله بن أبي بكر بن محمد بن عمرو · Chapters on Supplication

the Prophet (ﷺ) said: “Whoever says, when he goes to his bed: ‘I seek forgiveness from Allah, alladhi lā ilāha illā huw, al-Ḥayyul-Qayyūm, wa atūbu ilaihi)’ three times, Allah shall forgive him his sins if they were like the foam of the sea, even if they were the number of leaves of the trees, even if they were the number of sand particles of `Alij, even if they were the number of the days of the world.”