Al-Matalib al-'Aliyah 3385 — The virtue of remembrance

It is narrated from Uqbah bin Abd al-Ghafir (the narrator of the hadith, Hammad bin Salamah, says that to the best of his knowledge he narrated it as marfu', up to the Prophet (peace and blessings be upon him)) that he (peace and blessings be upon him) said: "Whoever says these words: 'Subhana rabbika rabbi al-'izzati 'amma yasifun, wa salamun 'ala al-mursalin, wa al-hamdu lillahi rabbi al-'alamin' [Surah al-Saffat: 180-182] (Glorified is your Lord, the Lord of Might, above all the (false) things that they (the polytheists) describe, and peace be upon all the Messengers, and all praise belongs to Allah, the Lord of all the worlds), he has certainly measured (his reward) with the fullest measure (that is, he has attained the fullest reward)."
Ibn Abi Umar narrated this hadith in his Musnad; Imam Hammad bin Salamah mentioned its being marfu', and the words mentioned in it consist of the final verses of Surah al-Saffat of the Noble Qur'an, which are a comprehensive collection of the glorification of Allah Almighty, peace upon the Messengers, and the praise of Allah.