"Indeed, it throws," meaning: the Fire, "sparks like a fortress," meaning: a fortress among the fortresses, in the recitation of one who recites it with a quiescent "ṣād."
﴿إِنَّهَا ترمي﴾ يَعْنِي: النَّار ﴿بشرر كالقصر﴾ يَعْنِي: قصْرًا مِنَ الْقُصُورِ فِي قِرَاءَةِ مَنْ قَرَأَهَا بِجَزْمِ الصَّادِ
