Sunan Ibn Majah 674
سنن ابن ماجه#674SahihIt was narrated that Abu Barzah Al-Aslami said:"The Prophet used to pray the Hajir prayer, which you call 'Zuhr', when the sun had passed its zenith
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih - Bukhari And Muslim
In-book reference: 2:8