(7) باب إِذَا أُذِّنَ وَأَنْتَ فِي الْمَسْجِدِ فَلاَ تَخْرُجْ
It was narrated that Abu Sha'tha said:
"We were sitting in the mosque with Abu Hurairah when the Mu'adh-dhin called the Adhan. A man got up and walked out of the mosque, and Abu Hurairah followed him with his gaze until he left the mosque. Then Abu Hurairah said: "This man has disobeyed Abul-Qasim.'"
Reference: Sunan Ibn Majah 733
In-book reference: Book 3, Hadith 28
English translation: Vol. 1, Book 3, Hadith 733