We were in the company of the Prophet (ﷺ) in a Ghazwa. A large number of Muhâjirîn (emigrants) joined him and among the Muhâjirîn (emigrants) there was a person who used to play jokes (or play with spears); so he (jokingly) stroked an man (a man from among the supporters) on the hip. The got so angry that both of them called their people. The said, "Help, O ! " And the Muhajir (emigrant) said, "Help, O Muhajirin (emigrants) ! " The Prophet (ﷺ) came out and said, "What is wrong with the people (as they are calling) this call of the Pre-Islâmic Period of Ignorance?" Then he said, "What is the matter with them?" So he was told about the stroke of the Muhajir (emigrant) to the. The Prophet (ﷺ) said, "Stop this for it is an evil call." Abdullah bin Ubai bin Salûl (a hypocrite) said, "The emigrants have called and (gathered against us); so when we return to Al-Madîna, surely, the more honourable people will expel therefrom the meaner." Upon that Umar said, O Allâh's Prophet (ﷺ)! Shall we not kill this evil person (i.e. Abdullah bin Ubai bin Salûl)?" The Prophet (ﷺ) said, "(No), lest the people should say that Muhammad (ﷺ) used to kill his companions." [4:720 (B)-O.B]