Allah's Messenger (ﷺ) said, "If anyone of you enters a mosque, he should pray two rak`at before sitting."
Sahih al-Bukhari Book 8, Hadith 93
← Previous Hadith I went to the Prophet (ﷺ) in the mosque (the sub-narrator Mas`ar thought that Jabir had said, "In the forenoon.") He ordered me to pray two rak`at. He owed me some money and he repaid it to me and gave more than what was due to me.

Sahih al-Bukhari Book 8, Hadith 92 Next Hadith → Allah's Messenger (ﷺ) said, "The angels keep on asking Allah's forgiveness for anyone of you, as long as he is at his Musalla (praying place) and he does not pass wind (Hadath). They say, 'O Allah! Forgive him, O Allah! be Merciful to him."

Sahih al-Bukhari Book 8, Hadith 94