The Book of Funerals
21/45. Chapter:
The Command To Stand Up for A Funeral
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنْ عَامِرِ بْنِ رَبِيعَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا رَأَى أَحَدُكُمُ الْجَنَازَةَ فَلَمْ يَكُنْ مَاشِيًا مَعَهَا فَلْيَقُمْ حَتَّى تُخَلِّفَهُ أَوْ تُوضَعَ مِنْ قَبْلِ أَنْ تُخَلِّفَهُ " .
It was narrated from 'Amir bin Rabi'ah that the Prophet said: "When any one of you sees a funeral and is not walking with it, let him stand up until it has passed him, or until (the body) is placed (in the grave) before if passes him."
Reference : Sunan an-Nasa'i 1915In-book reference : Book 21, Hadith 98English translation : Vol. 3, Book 21, Hadith 1916