Musannaf Ibn Abi Shayba 37:248

Waki’ and Abu Nu’aym narrated to us, from Sufyan, from Nusayr, from Hubayrah ibn Khuzaymah, from Rabi’ ibn Khuthaym, who said: When the news of the killing of al-Husayn came, he said: "O Allah, You judge between Your servants concerning that wherein they used to differ."