Narrated `Urwa bin Az-Zubair: `Aisha said, "The Prophet (ﷺ) 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."
Source: sunnah.com
Other translations
Arabic
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.
sunnah.com