Abu Salamah bin Abdur Rahman says: On Marwah, Sayyiduna Abdullah bin Umar and Sayyiduna Abdullah bin Amr bin Aas (may Allah be pleased with them) met each other, they talked, then Sayyiduna Abdullah bin Amr (may Allah be pleased with them) left, and behind him Sayyiduna Abdullah bin Umar (may Allah be pleased with them) began to weep. A man said to him: O Abu Abdur Rahman! Why are you weeping? He said: This Sayyiduna Abdullah bin Amr (may Allah be pleased with them) has said that the Messenger of Allah (peace and blessings be upon him) said: Whoever has arrogance equal to a mustard seed in his heart, Allah Almighty will throw him on his face into Hell.