Hadith 8:450
Abu Bakr narrated to us, he said: Ibn Fudayl narrated to us, from Layth, from Mujahid and 'Ata, they both said: They shall complete their Hajj, and upon each one of them is a sacrificial animal (dam). If it is one (animal), it suffices them both. And upon them is the Hajj from the following year, and they shall not separate.
حدثنا أبو بكر قال حدثنا بن فضيل عن ليث عن مجاهد وعطاء قالا يتمان على حجهما وعلى كل واحد منهما دم وإن كان واحدا أجزاهما وعليهما الحج من قابل ولا يتفرقان