Musnad Abu Ya'la al-Mawsili 5:11

Muhammad ibn Isma'il ibn Abi Samina al-Basri narrated to us, Sufyan ibn 'Uyaynah narrated to us, from Muhammad ibn 'Amr, from Ibn Hatib, from 'Abdullah ibn al-Zubayr, from al-Zubayr, who said: When "You shall surely be questioned that day about the delight" (Surah al-Takathur) was revealed, al-Zubayr said: I said, "O Messenger of Allah, and what delight are we in, when they are only the two black things (water and dates)?" He said: "It will surely happen."