Sunan an-Nasa'i #1940 · The Book of Funerals

Sunan an-Nasa'iIt was narrated that Al-Musayyab bin Rafi' said
Sunan an-Nasa'i · Book 21 · The Book of Funerals
Sunan an-Nasa'i · كتاب 21 · كتاب الجنائز
"I heard Al-Bara' bin 'Azib say: The Messenger of Allah said: 'whoever follows a Janazah until the prayer is offered, he will have one Qirat of reward and whoever walks with the funeral until (the body) is buried will have two Qirats of reward, and a Qirat is like Uhud
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا عَبْثَرٌ، عَنْ بُرْدٍ، أَخِي يَزِيدَ بْنِ أَبِي زِيَادٍ عَنِ الْمُسَيَّبِ بْنِ رَافِعٍ، قَالَ سَمِعْتُ الْبَرَاءَ بْنَ عَازِبٍ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ مَنْ تَبِعَ جَنَازَةً حَتَّى يُصَلَّى عَلَيْهَا كَانَ لَهُ مِنَ الأَجْرِ قِيرَاطٌ وَمَنْ مَشَى مَعَ الْجَنَازَةِ حَتَّى تُدْفَنَ كَانَ لَهُ مِنَ الأَجْرِ قِيرَاطَانِ وَالْقِيرَاطُ مِثْلُ أُحُدٍ ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 1940In-book reference : Book 21, Hadith 123