Hadith 8:163
Abu Bakr narrated to us, he said: Jarir narrated to us, from Layth and Mansur, from Mujahid, who said: He sends a sacrificial animal (hady), and he makes it lawful (halal) by it.
حدثنا أبو بكر قال ثنا جرير عن ليث ومنصور عن مجاهد قال يبعث بهدي يحل به