[Machine] From Abdullah bin Mas'ud, "When one of you follows a funeral procession, let him hold onto the four corners of the bier, then let him volunteer afterwards or leave, for indeed, this is from the Sunnah."  

عَنْ عَبْدِ اللهِ بْنِ مَسْعُودٍ ؓ إِذَا تَبِعَ أَحَدُكُمُ الْجِنَازَةَ فَلْيَأْخُذْ بِجَوَانِبِ السَّرِيرِ الْأَرْبَعَةِ ثُمَّ لِيَتَطَوَّعْ بَعْدُ أَوْ يَذَرَ فَإِنَّهُ مِنَ السُّنَّةِ