حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ يَزِيدَ بْنِ كَيْسَانَ، حَدَّثَنِي أَبُو حَازِمٍ عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏"‏ مَنْ صَلَّى عَلَى جَنَازَةٍ فَلَهُ قِيرَاطٌ وَمَنِ اتَّبَعَهَا حَتَّى تُوضَعَ فِي الْقَبْرِ فَقِيرَاطَانِ ‏"‏ ‏.‏ قَالَ قُلْتُ يَا أَبَا هُرَيْرَةَ وَمَا الْقِيرَاطُ قَالَ ‏"‏ مِثْلُ أُحُدٍ ‏"‏ ‏.‏

Abu Huraira reported Allah's Messenger (PBUH) as saying: He who offers prayer for the dead, for him is (the reward of) one qirat; and he who follows the bier till it is placed in the grave, for him (is the reward of) two qirats. I (Abu Hazim, one of the narrators) said: Abu Huraira, what is a qirat? He said: It is like the hill of Uhud. Translation Not Available

Book Ref: Sahih Muslim Book 11 Hadith 2067
Web Ref:  Sahih Muslim Book 4 Hadith 945 e