Mas’ala 43، المهذب | Fiqh of the Four Schools

Mas’ala 43المهذبShafi'ivol. 1, p. 135vol. 1, p. 135

وَإِنْ لَمْ يَبْلُغْ قُلَّتَيْنِ كَالْأَرْضِ النَّجِسَةِ إذَا طُرِحَ عَلَيْهَا ماء حتى غمر النجاسة:

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