Musannaf Ibn Abi Shaybah 20615 — What is mentioned on the virtue

Abu Qabil (may Allah have mercy on him) said: Someone asked Sayyiduna Abdullah bin Amr (may Allah be pleased with them both): "Will Constantinople be conquered first, or Rome?" Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) sent for a chest of his that had rings, took out a book from it and began to read. Then he said: "We used to sit around the Messenger of Allah (peace and blessings be upon him) writing. Once he was asked: 'Will Constantinople be conquered first, or Rome?' The Prophet (peace and blessings be upon him) said: 'The city of Heraclius will be conquered first.'"