The Prophet ﷺ as saying: When you see a funeral, stand up for it till it leaves you behind or it is placed (on the ground).  

النَّبِيَّ ﷺ إِذَا رَأَيْتُمُ الْجَنَازَةَ فَقُومُوا لَهَا حَتَّى تُخَلِّفَكُمْ أَوْ تُوضَعَ  

The Messenger of Allah ﷺ as saying: When you follow a funeral, do not sit until the bier is placed (on the ground). Abu Dawud said: This tradition has been narrated by al-Thawri (i.e. Sufyan) from Suhail, from his father on the authority of Abu Hurairah. This version has: until it (the bier) is placed on the ground. It has also been narrated by Abu Mu'wiyah from Suhail. This has: Until it is placed in the grave. Abu Dawud said: Sufyan's version is more guarded than that of Abu Mu'awiyah.  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا تَبِعْتُمُ الْجَنَازَةَ فَلاَ تَجْلِسُوا حَتَّى تُوضَعَ  

We were with the Prophet ﷺ when a funeral passed hi and he stood up for it. When we went to carry it, we found that it was a funeral of a Jew. We, therefore said: Messenger of Allah, this is the funeral of a Jew. He said: Death is fearful event, so when you see a funeral, stand up.  

كُنَّا مَعَ النَّبِيِّ ﷺ إِذْ مَرَّتْ بِنَا جَنَازَةٌ فَقَامَ لَهَا فَلَمَّا ذَهَبْنَا لِنَحْمِلَ إِذَا هِيَ جَنَازَةُ يَهُودِيٍّ فَقُلْنَا يَا رَسُولَ اللَّهِ إِنَّمَا هِيَ جَنَازَةُ يَهُودِيٍّ فَقَالَ إِنَّ الْمَوْتَ فَزَعٌ فَإِذَا رَأَيْتُمْ جَنَازَةً فَقُومُوا  

The Prophet ﷺ stood up for a funeral (to show respect) and thereafter he sat down.  

أَنَّ النَّبِيَّ ﷺ قَامَ فِي الْجَنَائِزِ ثُمَّ قَعَدَ بَعْدُ  

The Messenger of Allah ﷺ used to stand up for a funeral until the corpse was placed in the grave. A learned Jew (once) passed him and said: This is how we do. The Prophet ﷺ sat down and said: Sit down and act differently from them.  

كَانَ رَسُولُ اللَّهِ ﷺ يَقُومُ فِي الْجَنَازَةِ حَتَّى تُوضَعَ فِي اللَّحْدِ فَمَرَّ بِهِ حَبْرٌ مِنَ الْيَهُودِ فَقَالَ هَكَذَا نَفْعَلُ فَجَلَسَ النَّبِيُّ ﷺ وَقَالَ اجْلِسُوا خَالِفُوهُمْ