question #3 Sahih al-Bukhari 470, Book 8, Hadith 118 : What actions might lead to punishment if committed in the mosque, based on the behavior of Umar bin Al-Khattab?

I was standing in the mosque and somebody threw a gravel at me. I looked and found that he was
`Umar bin Al-Khattab. He said to me, “Fetch those two men to me.” When I did, he said to them,
“Who are you? (Or) where do you come from?” They replied, “We are from Ta’if.” `Umar said, “Were
you from this city (Medina) I would have punished you for raising your voices in the mosque of
Allah’s Messenger (ﷺ).”