Sunan an-Nasa'i 477
سنن النسائي#477Sahihأَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم صَلَّى الظُّهْرَ بِالْمَدِينَةِ أَرْبَعًا وَصَلَّى الْعَصْرَ بِذِي الْحُلَيْفَةِ رَكْعَتَيْنِ .
It was narrated from Anas bin Malik that the Prophet (ﷺ) prayed Zuhr in Al-Madinah, four Rak'ahs, and he prayed 'Asr in Dhul-Hulaifah, two Rak'ahs
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: 5:30