That the Prophet (صلى الله عليه وعلى آله وسلم) would recite the Musabbihat* (Chapters 17, 57, 59, 61, 62, 64 & 87) before sleep and say “Indeed there is an Ayah in them that is better than one thousand Ayat.”

*Quran Surahs that start with the glorification of Allah

Jami` at-Tirmidhi Vol. 5, Book 42, Hadith 2921

57.2 Imam Ahmad (رحمه الله) recorded

That `Irbad bin Sariyah (رضي الله عنه) said that the Messenger of Allah (صلى الله عليه وعلى آله وسلم) used to recite Al-Musabbihat before he went to sleep, saying, “In them there is an Ayah that is better than a thousand Ayat”. Abu Dawud, At-Tirmidhi and An-Nasa’i collected this Hadith; At-Tirmidhi said, “Hasan Gharib.” The Ayah referred to in this Hadith is

﴾ هو الأول والآخر والظاهر والباطن وهو بكل شيء عليم ﴿