Musannaf Ibn Abi Shayba 3:2139

Yahya ibn Sa'id narrated to us, from Muhammad ibn Yusuf, from his father, who said: Some of the prayer was missed by Ibn al-Zubayr. He said to me with his hand, "How much did I miss?" I said, "I do not know what you are saying." He said, "How much did I pray?" I said, "Such and such." He said, "So he prayed [the remainder] and prostrated two prostrations."