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Mas’ala 1836المهذبShafi'ivol. 4, p. 254vol. 4, p. 254

فَإِنْ صَلَّى خَلْفَهَا وَلَمْ يَعْلَمْ ثُمَّ عَلِمَ لَزِمَهُ الْإِعَادَةُ لِأَنَّ عَلَيْهَا أَمَارَةً تدل على انها امرأة فلم يُعْذَرُ فِي صَلَاتِهِ خَلْفَهَا

Its commentaries

المجموع شرح المهذبal-Nawawi

its words on this mas’ala come with mas’ala 1835 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.