Sahih Muslim 530
Sahih Muslim · Book 5: The Book of Mosques and Places of Prayer · The prohibition of building masajid over graves and placing images therein; and the prohibition of taking graves as masajid
Abu Huraira reported:
وَحَدَّثَنِي قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا الْفَزَارِيُّ ، عَنْ عُبَيْدِ اللَّهِ بْنِ الأَصَمِّ ، حَدَّثَنَا يَزِيدُ بْنُ الأَصَمِّ ، عَنْ أَبِي هُرَيْرَةَ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لَعَنَ اللَّهُ الْيَهُودَ وَالنَّصَارَى اتَّخَذُوا قُبُورَ أَنْبِيَائِهِمْ مَسَاجِدَ " .
The Messenger of Allah (ﷺ) said: Let there be curse of Allah upon the Jews and the Christians for they have taken the graves of their apostles as places of worship.