Ash-Sha'bi said: "I was informed by one who saw the Prophet: He (pbuh) saw a solitary grave, s he lined his Companions (behind him) to pray over it." It was said to him (Ash-Sha'bi): "Who informed you?" He said: "Ibn Abbas."
أَخْبَرَنِي مَنْ رَأَى النَّبِيَّ ﷺ وَرَأَى قَبْرًا مُنْتَبِذًا فَصَفَّ أَصْحَابَهُ خَلْفَهُ فَصَلَّى عَلَيْهِ فَقِيلَ لَهُ مَنْ أَخْبَرَكَهُ فَقَالَ ابْنُ عَبَّاسٍ قَالَ وَفِي الْبَابِ عَنْ أَنَسٍ وَبُرَيْدَةَ وَيَزِيدَ بْنِ ثَابِتٍ وَأَبِي هُرَيْرَةَ وَعَامِرِ بْنِ رَبِيعَةَ وَأَبِي قَتَادَةَ وَسَهْلِ بْنِ حُنَيْفٍ