The Book of Forgetfulness (In Prayer)
13/80. Chapter:
The command to recite the Al-Mu'awwidhat after saying the taslim at the end of the praye
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ سَلَمَةَ، قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، عَنِ اللَّيْثِ، عَنْ حُنَيْنِ بْنِ أَبِي حَكِيمٍ، عَنْ عُلَىِّ بْنِ رَبَاحٍ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ أَمَرَنِي رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ أَقْرَأَ الْمُعَوِّذَاتِ دُبُرَ كُلِّ صَلاَةٍ .
It was narrated that 'Uqbah bin 'Amr said: "The Messenger of Allah (ﷺ) commanded me to recite Al-Mu'awwidhat following every prayer."
Reference : Sunan an-Nasa'i 1336In-book reference : Book 13, Hadith 158English translation : Vol. 2, Book 13, Hadith 1337