محمد بن الحسن هذا الخبر محمول على النافلة لانا قد بينا ان الفريضة لا يجوز فيها أقل من سورة مع الحمد
Muhammad ibn Al-Hasan said: “This narration is to be understood as referring to the supererogatory (nafl) prayers, because we have already explained that in the obligatory (fard) prayer, it is not permissible to recite less than a complete Surah along with Al-Hamd.” As for what was narrated:
Commentary #7