Sunan an-Nasa'i 469
سنن النسائي#469SahihIt was narrated from Ibn Al-Munkadir and Ibrahim bin Maisarah, that they heard Anas say:"I prayed Zuhr with the Prophet (ﷺ) in Al-Madinah, four Rak'ahs and 'Asr in Dhul-Hulaifah, two Rak'ahs
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 5:22