The Book of Seeking Refuge with Allah
50/1. Chapter:
What was Narrated Concerning Al-Mu'awwidhatain (Two Surahs Seeking Refuge with Allah)
Sunan an-Nasai
أَخْبَرَنَا 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.
Reference : Sunan an-Nasa'i 5435In-book reference : Book 50, Hadith 8English translation : Vol. 6, Book 50, Hadith 5437