Sahih Bukhari

Narrated Ibn `Umar:While `Umar bin Al-Khattab was standing and delivering the sermon on a Friday, one of the companions of the Prophet, who was one of the foremost Muhajirs (emigrants) came. `Umar said to him, ""What is the time now?"" He replied, ""I was busy and could not go back to my house till I heard the Adhan. I did not perform more than the ablution."" Thereupon `Umar said to him, ""Did you perform only the ablution although you know that Allah's Messenger (ﷺ) used to order us to take a bath (on Fridays)?