'Abdullah (b. 'Umar) reported from his father that while he was addressing the people on Friday (sermon), a person, one of the Companions of the Messenger of Allah (ﷺ), entered (the mosque). Umar said to him loudly:
What is this hour (for attending the prayer)? He said: I was busy today and I did not return to my house when I heard the call (to Friday prayer), and I did no more but performed ablution only. Upon this Umar said: just ablution! You know that the Messenger of Allah (ﷺ) commanded (us) to take a bath (on Friday).
Reference: Sahih Muslim 845 a
In-book reference: Book 7, Hadith 5
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1836