(50) باب مَا ذُكِرَ عَنْ بَنِي إِسْرَائِيلَ
Narrated `Aisha and Ibn `Abbas:
On his death-bed Allah's Messenger (ﷺ) put a sheet over his-face and when he felt hot, he would remove it from his face. When in that state (of putting and removing the sheet) he said, "May Allah's Curse be on the Jews and the Christians for they build places of worship at the graves of their prophets." (By that) he intended to warn (the Muslim) from what they (i.e. Jews and Christians) had done.
Reference: Sahih al-Bukhari 3453, 3454
In-book reference: Book 60, Hadith 121
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 55, Hadith 660