Mas’ala 6520المبسوطHanafivol. 3, p. 199vol. 3, p. 199 فَإِنْ شَاءَتْ صَامَتْ عِشْرِينَ يَوْمًا كَمَا بَيَّنَّا، Read the whole chapterCopy with source On the map: PurityCompare