(3) باب النَّهْيِ عَنْ بِنَاءِ الْمَسَاجِدِ عَلَى الْقُبُورِ وَاتِّخَاذِ الصُّوَرِ فِيهَا وَالنَّهْيِ عَنِ اتِّخَاذِ الْقُبُورِ مَسَاجِدَ
'A'isha reported:
They (some Companions of the Holy Prophet) were conversing with one another in the presence of the Messenger of Allah (ﷺ) (during his last) illness. Umm Salama and Umm Habiba made a mention of the church and then (the hadith was) narrated.
Reference: Sahih Muslim 528 b
In-book reference: Book 5, Hadith 22
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1077