Ash-Shaibani narrated that Ash-Sha'bi said:

"Someone who saw the Prophet pass by an isolated grave told me that he offered the funeral prayer there and his Companions formed rows behind him." It was said: "Who told you this?" He said: "Ibn 'Abbas."

أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا هُشَيْمٌ، قَالَ الشَّيْبَانِيُّ أَنْبَأَنَا عَنِ الشَّعْبِيِّ، قَالَ أَخْبَرَنِي مَنْ، رَأَى النَّبِيَّ ﷺ مَرَّ بِقَبْرٍ مُنْتَبِذٍ، فَصَلَّى عَلَيْهِ وَصَفَّ أَصْحَابَهُ خَلْفَهُ . قِيلَ : مَنْ حَدَّثَكَ قَالَ : ابْنُ عَبَّاسٍ .