Musnad Abu Ya'la al-Mawsili 5:22

Muhammad ibn Isma'il ibn Abi Samina narrated to us, Sufyan ibn 'Uyaynah narrated to us, from Muhammad ibn 'Amr, from Ibn Hatib, from 'Abdullah ibn al-Zubayr, who said: When "Then indeed, you, on the Day of Resurrection, before your Lord will dispute" (Surah az-Zumar: 31) was revealed, al-Zubayr said: I said, "O Messenger of Allah, will our disputes from the world be repeated upon us?" He said, "Yes." He said: I said, "Then the matter is indeed severe."