Fadl bin Abbas was riding behind the Messenger of Allah ﷺ when a woman from Khathaam came to seek a religious ruling from him. Fadl kept looking at her and she kept looking at him, so the Messenger of Allah ﷺ turned Fadl's face to the other side.She said, "Messenger of Allah, Allah's obligation upon His servants concerning the Hajj has come due while my father is an old man who cannot remain steady upon a riding mount. May I perform the Hajj on his behalf?"He replied, "Yes."This took place during the Farewell Pilgrimage.
كان الفضل بن عباس رديف رسول الله ﷺ، فجاءته امرأة من خثعم تستفتيه، فجعل الفضل ينظر إليها وتنظر إليه، فجعل رسول الله ﷺ يصرف وجه الفضل إلى الشق الآخر، فقالت يا رسول الله، إن فريضة الله في الحج أدركت أبي شيخا كبيرا لا يستطيع أن يثبت على الراحلة أفأحج عنه؟ قال: نعم وذلك في حجة الوداع.
Malik narrated it in Hajj (97), from Ibn Shihab, from Sulayman bin Yasar, from Abdullah bin Abbas, and he related it.Bukhari narrated it in Jaza as-Sayd (1855), and Muslim in Hajj (1334), both of them through the route of Malik, with the same wording.