Musannaf Ibn Abi Shayba 33:429

Hussain bin Ali narrated to us, from Ibn Abjar, from Thawr, who said: Ibn Umar passed by a ruin while he was with a man. He said, "Call out." So he called out, but Ibn Umar did not answer him. Then he said to him, "Call out." So Ibn Umar answered him, "They have departed, and their deeds have remained."