Jami` at-Tirmidhi 494
جامع الترمذي#494SahihAnd Yunus and Ma'mar reported, from Az-Zuhri, from Salim Wudu from his father:"Umar bin Al-Khattab was giving a Khutbah on Friday when a man from the Companions of the Prophet entered. So he said: "What time is it?" So he said: 'I don't know, I heard the call and did nothing more than perform Wudu.' So he said: And Wudu again!? I know surely that the Messenger of Allah has ordered Ghusl
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 4:7