Musannaf Ibn Abi Shaybah

Hazrat Hakam, on the authority of Hazrat Abdur Rahman bin Abi Laila, narrates the statement of Hazrat Ka'b bin Ujrah: There are three phrases such that the one who says them, or he said, 'those who say them', will not be losers: Saying Subhan Allah thirty-three (33) times, and saying Alhamdulillah thirty-three (33) times, and saying Allahu Akbar thirty-four (34) times after every prayer. Hazrat Hakam says: After that, I never abandoned these phrases.