Hadithcore
Mishkat al-Masabih, 2151, 2152

Al-Irbād b. Sāriya said the Prophet (ﷺ) used to recite <i>al-Musabbihāt</i>* before going to sleep, and say they contained a verse which is better than a thousand verses. *These are said to be <i>sūras</i> 57, 59, 61, 62, 64, 87 which begin with the perfect, imperfect, or imperative of the verb <i>sabbaha</i> ('to glorify'). Tirmidhī and Abū Dāwūd transmitted it, and Dārimī transmitted it in <i>mursal</i> form on the authority of Khalid b. Ma'dān. Tirmidhī said this is a <i>hasan gharīb</i> tradition.

وَعَنِ الْعِرْبَاضِ بْنِ سَارِيَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَقْرَأُ الْمُسَبِّحَاتِ قَبْلَ أَنْ يَرْقُدَ يَقُولُ: «إِنَّ فِيهِنَّ آيَةٌ خَيْرٌ مِنْ أَلْفِ آيَةٍ» . رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُدَ. وَرَوَاهُ الدَّارِمِيُّ عَنْ خَالِدِ بْنِ مَعْدَانَ مُرْسَلًا. وَقَالَ التِّرْمِذِيُّ: هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ

References1 variant
In-Book Reference
Book 8, Hadith 42