Sahih al-Bukhari, 1390

Narrated `Aisha:Allah's Messenger (ﷺ) in his fatal illness said, "Allah cursed the Jews and the Christians, for they built the places of worship at the graves of their prophets." And if that had not been the case, then the Prophet's grave would have been made prominent before the people. So (the Prophet (ﷺ) ) was afraid, or the people were afraid that his grave might be taken as a place for worship

Rapporté par ‘Aïcha (رضى الله عنها) : Le Messager d’Allah ﷺ, lors de sa maladie dont il ne se releva pas, dit : « Qu’Allah maudisse les Juifs et les Chrétiens, ils ont pris les tombes de leurs prophètes comme lieux de prière. » Sans cela, sa tombe aurait été exposée, mais il craignait, ou l’on craignait, qu’elle ne soit prise comme lieu de prière