Al Fadl was riding behind the Prophet ﷺ and a woman from the tribe of Khath'am came up. Al Fadl started looking at her and she looked at him. The Prophet ﷺ turned Al-Fadl's face to the other side. She said, "My father has come under Allah's obligation of performing Hajj but he is very old man and cannot sit properly on his Rahila (mount). Shall I perform Hajj on his behalf ? The Prophet ﷺ replied affirmative. That happened during Hajjat-ul-Wada' of the Prophet ﷺ.  

كَانَ الْفَضْلُ رَدِيفَ النَّبِيِّ ﷺ فَجَاءَتِ امْرَأَةٌ مِنْ خَثْعَمٍ فَجَعَلَ الْفَضْلُ يَنْظُرُ إِلَيْهَا وَتَنْظُرُ إِلَيْهِ فَجَعَلَ النَّبِيُّ ﷺ يَصْرِفُ وَجْهَ الْفَضْلِ إِلَى الشِّقِّ الآخَرِ فَقَالَتْ إِنَّ فَرِيضَةَ اللَّهِ أَدْرَكَتْ أَبِي شَيْخًا كَبِيرًا لاَ يَثْبُتُ عَلَى الرَّاحِلَةِ أَفَأَحُجُّ عَنْهُ قَالَ نَعَمْ وَذَلِكَ فِي حَجَّةِ الْوَدَاعِ