(7) باب إِذَا أُذِّنَ وَأَنْتَ فِي الْمَسْجِدِ فَلاَ تَخْرُجْ
It was narrated that 'Uthman said:
"The Messenger of Allah said: 'Whoever hears the Adhan when he is in the mosque, then goes out and does not go out for any (legitimate) need and does not intend to return, is a hypocrite.'" (FR)
Reference (FR): Sunan Ibn Majah 734 (FR)
In-book reference (FR): Book 3, Hadith 29 (FR)
English translation (FR): Vol. 1, Book 3, Hadith 734 (FR)