‘Uthman b. ‘Affan reported God’s Messenger as saying, “If the <i>adhan</i> is called when anyone is in the mosque and he goes out for any other reason than some necessary purpose, not intending to return, he is a hypocrite.” Ibn Majah transmitted it.

وَعَنْ عُثْمَانَ بْنِ عَفَّانَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ أَدْرَكَهُ الْأَذَانُ فِي الْمَسْجِدِ ثُمَّ خَرَجَ لَمْ يَخْرُجْ لِحَاجَةٍ وَهُوَ لَا يُرِيدُ الرّجْعَة فَهُوَ مُنَافِق» . رَوَاهُ ابْن مَاجَه