Volume 2, Book 26, Number 589:
Narrated 'Abdullah bin Abbas :
Al-Fadl (his brother) was riding behind Allah's Apostle and a woman from the tribe of
Khath'am came and Al-Fadl started looking at her and she started looking at him. The
Prophet turned Al-Fadl's face to the other side. The woman said, "O Allah's Apostle! The
obligation of Hajj enjoined by Allah on His devotees has become due on my father and he is
old and weak, and he cannot sit firm on the Mount; may I perform Hajj on his behalf?" The
Prophet replied, "Yes, you may." That happened during the Hajj-al-Wida (of the Prophet ).