Hadith 8:2729
Abu Bakr narrated to us, he said: Abd al-Salam narrated to us, from Hisham, from Ibn Sirin, who said: The most pleasing of things to him was that the Qarin (one performing Hajj Qiran) should enter into Ihram if he drives the sacrificial animal. And if he does not drive it, it does not please him.
حدثنا أبو بكر قال نا عبد السلام عن هشام عن بن سيرين قال كان أعجب الأشياء إليه أن يحرم القارن إذا ساق وإن لم يسق فلا يعجبه