Hadith 21:101
Sahih (Darussalam)
It was narrated that Abu Hurairah and Abu Sa'eed said:
"We never saw the Messenger of Allah attend any funeral where he sat down until (the body) was placed (in the grave)."
أَخْبَرَنَا يُوسُفُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا حَجَّاجٌ، عَنِ ابْنِ جُرَيْجٍ، عَنِ ابْنِ عَجْلاَنَ، عَنْ سَعِيدٍ، عَنْ أَبِي هُرَيْرَةَ، وَأَبِي، سَعِيدٍ قَالاَ مَا رَأَيْنَا رَسُولَ اللَّهِ صلى الله عليه وسلم شَهِدَ جَنَازَةً قَطُّ فَجَلَسَ حَتَّى تُوضَعَ
Original Reference: Sunan an-Nasa'i 1918