Musannaf Ibn Abi Shayba 18:407

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sufyan narrated to us, from Azhar, from Muharib ibn Dithar, he said: Two men came to Shurayh. This one had broken the molar of this one, and this one had broken the molar of this one. He said: "This is a tooth for a tooth."