Narrated 'Irbad bin Sariyah:
that the Prophet (ﷺ) would recite the Musabbihat (Chapters 17, 57, 59, 61-64 & 87) before sleep and say "Indeed there is an Ayah in them that is better than one thousand Ayat." (IT)
English reference (IT): Vol. 5, Book 42, Hadith 2921 (IT)
Arabic reference (IT): Book 45, Hadith 3171 (IT)