Sunan an-Nasa'i 1349

Muhammad ibn Isma‘il ibn Samurah narrated to us, from Asbat, who said: ‘Amr ibn Qays narrated to us, from al-Hakam, from ‘Abd al-Rahman ibn Abi Layla, from Ka‘b ibn ‘Ujrah, who said: The Messenger of Allah (peace and blessings be upon him) said: “Words repeated after prayer: whoever says them will not be disappointed—glorify Allah thirty-three times after every prayer, praise Him thirty-three times, and declare His greatness thirty-four times.”