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) (p.b.u.h) used to order us to take a
bath (on Fridays)?"
Sahih al-Bukhari Book 11, Hadith 3