اَلسَّلَامُ عَلَى أَهْلِ الدِّيَارِ مِنَ الْمُؤْمِنِيْنَ وَالْمُسْلِمِيْنَ وَيَرْحَمُ اللَّهُ الْمُسْتَقْدِمِيْنَ مِنَّا وَالْمُسْتَأْخِرِيْنَ وَإِنَّا إِنْ شَاءَ اللَّهُ بِكُمْ لَلَاحِقُونَ

As-salamu 'ala ahlid diya-ri minal mu’minin wal muslimin, wa yarhamullahul mustaq’dimina minna-wal mustakhirin, wa inna- insa allahu bikum lala-’hiqun

Peace be upon the inhabitants of this place among the believers and Muslims. May Allah have mercy upon those who have gone on ahead of us and those who come later on, and we will join you, if Allah wills. A’isha (RA) asked Allah’s messenger (ﷺ) what she should say, i.e. when visiting graves, and he told her to say (The Dua is mentioned above).

Reference: Sahih. Mishkatul Masabih: 1767