Sunan an-Nasa'i 5435
سنن النسائي#5435Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ، قَالَ حَدَّثَنَا مُعَاوِيَةُ، عَنِ الْعَلاَءِ بْنِ الْحَارِثِ، عَنْ مَكْحُولٍ، عَنْ عُقْبَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَرَأَ بِهِمَا فِي صَلاَةِ الصُّبْحِ .
It was narrated from 'Uqbah that:The Messenger of Allah [SAW] recited them in the Subh prayer
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 50:8