Um Habiba and Um Salama mentioned about a church they had seen in Ethiopia in which there were pictures. They told the Prophet ﷺ about it, on which he said, "If any religious man dies amongst those people they would build a place of worship at his grave and make these pictures in it. They will be the worst creature in the sight of Allah on the Day of Resurrection."  

أَنَّ أُمَّ حَبِيبَةَ وَأُمَّ سَلَمَةَ ذَكَرَتَا كَنِيسَةً رَأَيْنَهَا بِالْحَبَشَةِ فِيهَا تَصَاوِيرُ فَذَكَرَتَا لِلنَّبِيِّ ﷺ فَقَالَ إِنَّ أُولَئِكَ إِذَا كَانَ فِيهِمُ الرَّجُلُ الصَّالِحُ فَمَاتَ بَنَوْا عَلَى قَبْرِهِ مَسْجِدًا وَصَوَّرُوا فِيهِ تِلْكَ الصُّوَرَ فَأُولَئِكَ شِرَارُ الْخَلْقِ عِنْدَ اللَّهِ يَوْمَ الْقِيَامَةِ  

Aisha said, "The Prophet ﷺ in his fatal illness said, 'Allah cursed the Jews and the Christians because they took the graves of their Prophets as places for praying."' Aisha added, "Had it not been for that, the grave of the Prophet ﷺ would have been made prominent but I am afraid it might be taken (as a) place for praying.  

عَنِ النَّبِيِّ ﷺ قَالَ فِي مَرَضِهِ الَّذِي مَاتَ فِيهِ لَعَنَ اللَّهُ الْيَهُودَ وَالنَّصَارَى اتَّخَذُوا قُبُورَ أَنْبِيَائِهِمْ مَسْجِدًا قَالَتْ وَلَوْلاَ ذَلِكَ لأَبْرَزُوا قَبْرَهُ غَيْرَ أَنِّي أَخْشَى أَنْ يُتَّخَذَ مَسْجِدًا  

Messenger of Allah ﷺ said, "May Allah's curse be on the Jews for they built the places of worship at the graves of their Prophets."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ قَاتَلَ اللَّهُ الْيَهُودَ اتَّخَذُوا قُبُورَ أَنْبِيَائِهِمْ مَسَاجِدَ  

When the last moment of the life of Messenger of Allah ﷺ came he started putting his 'Khamisa' on his face and when he felt hot and short of breath he took it off his face and said, "May Allah curse the Jews and Christians for they built the places of worship at the graves of their Prophets." The Prophet ﷺ was warning (Muslims) of what those had done.  

لَمَّا نَزَلَ بِرَسُولِ اللَّهِ ﷺ طَفِقَ يَطْرَحُ خَمِيصَةً لَهُ عَلَى وَجْهِهِ فَإِذَا اغْتَمَّ بِهَا كَشَفَهَا عَنْ وَجْهِهِ فَقَالَ وَهْوَ كَذَلِكَ لَعْنَةُ اللَّهِ عَلَى الْيَهُودِ وَالنَّصَارَى اتَّخَذُوا قُبُورَ أَنْبِيَائِهِمْ مَسَاجِدَ يُحَذِّرُ مَا صَنَعُوا