The wives of the Messenger of Allah (may peace be Upon him) made a mention of the church which they had seen in Abyssinia which was called Marya, and the rest of the hadith is the same.
Sahih Muslim Book 5, Hadith 23
← Previous Hadith 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.

Sahih Muslim Book 5, Hadith 22 Next Hadith → The Messenger of Allah (ﷺ) said during his illness from which he never recovered: Allah cursed the Jews and the Christians that they took the graves of their prophets as mosques. She ('A'isha) reported: Had it not been so, his (Prophet's) grave would have been in an open place, but it could not be due to the fear that it may not be taken as a mosque.

Sahih Muslim Book 5, Hadith 24