Musannaf Ibn Abi Shayba 37:221

Khalaf ibn Khalifah narrated to us, from his father, who said: I was informed that when al-Hajjaj killed Ibn al-Zubayr, he brought him to Mina and crucified him at the mountain pass in the bottom of the valley. Then he said to the people, "Look at this; this is the worst of the nation." He said: I saw Ibn Umar come on a mule of his, and he went to bring it near the trunk, but it began to shy away. He said to a freedman of his, "Woe to you, take its bridle and bring it near." He said: So I saw him bring it near, and Abdullah ibn Umar stood there saying, "May Allah have mercy on you; you were indeed one who fasted much and prayed much, and a nation of which you are the worst has indeed succeeded."