Sahih Bukhari Volume 5, Book 64, Hadith 4443

حَدَّثَنَا الصَّلْتُ بْنُ مُحَمَّدٍ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ هِلاَلٍ الْوَزَّانِ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ قَالَ النَّبِيُّ صلى الله عليه وسلم فِي مَرَضِهِ الَّذِي لَمْ يَقُمْ مِنْهُ ‏"‏ لَعَنَ اللَّهُ الْيَهُودَ، اتَّخَذُوا قُبُورَ أَنْبِيَائِهِمْ مَسَاجِدَ ‏"‏‏.‏ قَالَتْ عَائِشَةُ لَوْلاَ ذَلِكَ لأُبْرِزَ قَبْرُهُ‏.‏ خَشِيَ أَنْ يُتَّخَذَ مَسْجِدًا‏.‏

Narrated By Urwa bin Az-Zubair : 'Aisha said, "The Prophet said during his fatal illness, "Allah cursed the Jews for they took the graves of their prophets as places for worship." 'Aisha added, "Had it not been for that (statement of the Prophet) his grave would have been made conspicuous. But he was afraid that it might be taken as a place for worship."