"The Messenger of Allah said: 'If you see a funeral, then stand up, and whoever follows it, then let him not sit down until (the body) is placed in the grave."'  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا رَأَيْتُمُ الْجَنَازَةَ فَقُومُوا وَمَنْ تَبِعَهَا فَلاَ يَقْعُدَنَّ حَتَّى تُوضَعَ