Sunan an-Nasa'i 775
سنن النسائي#775Sahihأَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، عَنْ يَزِيدَ بْنِ زُرَيْعٍ، وَغَسَّانَ بْنِ مُضَرَ، قَالاَ حَدَّثَنَا أَبُو مَسْلَمَةَ، - وَاسْمُهُ سَعِيدُ بْنُ يَزِيدَ بَصْرِيٌّ - ثِقَةٌ قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ أَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي فِي النَّعْلَيْنِ قَالَ نَعَمْ .
Abu Maslamah - whose name is Saeed bin Yazid, a trustworthy Basri - told us:"I asked Anas bin Malik: 'Did the Prophet (ﷺ) pray in sandals?' He said: 'Yes
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 ZaiSahih - Agreed Upon
In-book reference: 9:34