The sitting of two men together over a riding animal

Narrated Anas:

I was riding behind Abu Talha (on the same) riding animal) and (the Prophet's companions) were reciting Talbiya aloud for both Hajj and 'Umra.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ الْوَهَّابِ، حَدَّثَنَا أَيُّوبُ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ كُنْتُ رَدِيفَ أَبِي طَلْحَةَ، وَإِنَّهُمْ لَيَصْرُخُونَ بِهِمَا جَمِيعًا الْحَجِّ وَالْعُمْرَةِ.