When the disease of Messenger of Allah ﷺ got aggravated, he covered his face with a Khamisa, but when he became short of breath, he would remove it from his face and say, "It is like that! May Allah curse the Jews Christians because they took the graves of their prophets as places of worship." By that he warned his follower of imitating them, by doing that which they did.  

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

Messenger of Allah ﷺ offered prayer while he was wearing a Khamisa of his that had printed marks. He looked at its marks and when he finished prayer, he said, "Take this Khamisa of mine to Abu Jahm, for it has just now diverted my attention from my prayer, and bring to me the Anbijania (a plain thick sheet) of Abu Jahm bin Hudhaifa bin Ghanim who belonged to Bani Adi bin Kaʿb."  

صَلَّى رَسُولُ اللَّهِ ﷺ فِي خَمِيصَةٍ لَهُ لَهَا أَعْلاَمٌ فَنَظَرَ إِلَى أَعْلاَمِهَا نَظْرَةً فَلَمَّا سَلَّمَ قَالَ اذْهَبُوا بِخَمِيصَتِي هَذِهِ إِلَى أَبِي جَهْمٍ فَإِنَّهَا أَلْهَتْنِي آنِفًا عَنْ صَلاَتِي وَائْتُونِي بِأَنْبِجَانِيَّةِ أَبِي جَهْمِ بْنِ حُذَيْفَةَ بْنِ غَانِمٍ مِنْ بَنِي عَدِيِّ بْنِ كَعْبٍ  

Aisha brought out to us a Kisa and an Izar and said, "The Prophet ﷺ died while wearing these two." (Kisa, a square black piece of woolen cloth. Izar, a sheet cloth garment covering the lower half of the body).  

أَخْرَجَتْ إِلَيْنَا عَائِشَةُ كِسَاءً وَإِزَارًا غَلِيظًا فَقَالَتْ قُبِضَ رُوحُ النَّبِيِّ ﷺ فِي هَذَيْنِ