Jami` at-Tirmidhi 2921
جامع الترمذي#2921HasanNarrated 'Irbad bin Sariyah:that the Prophet (ﷺ) 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan
Al-AlbaniHasan
Bashar Awad MaaroufHasan
Zubair Ali ZaiHasan
In-book reference: 45:47