It is narrated from Sayyiduna Fadl (may Allah be pleased with him) that a woman from the tribe of Khath'am came to the Prophet (peace and blessings of Allah be upon him) and said: O Messenger of Allah! The obligation of Hajj has been imposed by Allah upon my father, but he has become so old that he cannot even sit on a mount. The Prophet (peace and blessings of Allah be upon him) said: "Perform Hajj on his behalf."