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.
عَنْ عَائِشَةَ أَنَّهُمْ تَذَاكَرُوا عِنْدَ رَسُولِ اللَّهِ ﷺ فِي مَرَضِهِ فَذَكَرَتْ أُمُّ سَلَمَةَ وَأُمُّ حَبِيبَةَ كَنِيسَةً ثُمَّ ذَكَرَ نَحْوَهُ