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Mas’ala 2837المهذبShafi'ivol. 5, p. 477vol. 5, p. 477

وَإِنْ لَمْ يُصَدِّقْهُ حَلَّفَهُ وَهَلْ الْيَمِينُ مُسْتَحَبَّةٌ أَوْ وَاجِبَةٌ فِيهِ وَجْهَانِ (أَحَدُهُمَا) أَنَّهَا واجبة

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Its commentaries

المجموع شرح المهذبal-Nawawi

its words on this mas’ala come with mas’ala 2828 before it

A number in a circle: a mas’ala the commentary adds, numbered through it. In bold: the text’s own words inside the commentary.