Janaab Ja'far bin Abdullah narrates that I saw Muhammad bin 'Abbad bin Ja'far kiss the Black Stone and prostrate on it. Then he said, "I saw your uncle Ibn 'Abbas (may Allah be pleased with them) kiss the Black Stone and prostrate on it." Sayyiduna Ibn 'Abbas (may Allah be pleased with them) says, "I saw Sayyiduna 'Umar bin Khattab (may Allah be pleased with him) kiss the Black Stone and prostrate on it. Then he said, 'I saw the Messenger of Allah (peace and blessings be upon him) do this, so I have done the same.'"