Sunan At-Tirmidhi

And 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