Sunan Abi Dawud 1523
سنن أبي داود#1523Sahihحَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ الْمُرَادِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، عَنِ اللَّيْثِ بْنِ سَعْدٍ، أَنَّ حُنَيْنَ بْنَ أَبِي حَكِيمٍ، حَدَّثَهُ عَنْ عُلَىِّ بْنِ رَبَاحٍ اللَّخْمِيِّ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ أَمَرَنِي رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ أَقْرَأَ بِالْمُعَوِّذَاتِ دُبُرَ كُلِّ صَلاَةٍ .
Narrated Uqbah ibn Amir: The Messenger of Allah (ﷺ) commanded me to recite Mu'awwidhatan (the last two surahs of the Qur'an) after every 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:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 8:108