Mas’ala 1721المبسوطHanafivol. 1, p. 172vol. 1, p. 172 قَالَ: (وَإِنْ قَهْقَهَ الْإِمَامُ وَالْقَوْمُ جَمِيعًا، Read the whole chapterCopy with source On the map: PrayerCompare