Mishkat al-Masabih 5 Funerals كتاب الجنائز 237

عَنِ ابْنِ عَبَّاسٍ قَالَ: مَرَّ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِقُبُورٍ بِالْمَدِينَةِ فَأَقْبَلَ عَلَيْهِمْ بِوَجْهِهِ فَقَالَ: «السَّلَامُ عَلَيْكُمْ يَا أَهْلَ الْقُبُورِ يَغْفِرُ اللَّهُ لَنَا وَلَكُمْ أَنْتُمْ سَلَفُنَا وَنَحْنُ بِالْأَثَرِ» . رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ

Ibn ‘Abbas said that when God’s messenger passed by some graves in Medina he turned his face towards them and said, “Peace be upon you, inhabitants of the graves. God forgive us and you. You have gone before us and we are coming after.” Tirmidhi transmitted it saying this is a hasan gharib tradition.