Musannaf Ibn Abi Shaybah 28281 — Reports on arrogance

Sa'id bin Hayyan al-Taymi said: Sayyiduna Abdullah bin Amr (may Allah be pleased with him) and Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) met and spoke privately with each other. Then each of them returned to his companions. Sayyiduna Ibn Umar (may Allah be pleased with them both) returned weeping. People asked him: "What has made you weep?" He said: "What made me weep is this man who says that he heard the Messenger of Allah (peace and blessings be upon him) saying: 'No one in whose heart there is a mustard seed's weight of pride will enter Paradise.'"