رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1759
The Book of the Prohibited actions
Undesirability of offering optional Prayer after the announcement of Iqamah
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّه عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: إِذَا أُقِيمَتِ الصَّلَاةُ، فَلَا صَلَاةَ إِلَّا الْمَكْتُوبَة ((رَوَاهُ مُسلم)).
Abu Hurairah (May Allah be pleased with him) said: The Prophet (ﷺ) said, "When the Iqamah is called, no prayer should be performed except the obligatory prayer." [Muslim].
Riyad as-Salihin, 1759