Sahih Bukhari Volume 3, Book 28, Hadith 1856

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ كَانَ الْفَضْلُ رَدِيفَ النَّبِيِّ صلى الله عليه وسلم فَجَاءَتِ امْرَأَةٌ مِنْ خَثْعَمٍ، فَجَعَلَ الْفَضْلُ يَنْظُرُ إِلَيْهَا، وَتَنْظُرُ إِلَيْهِ فَجَعَلَ النَّبِيُّ صلى الله عليه وسلم 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

Narrated By 'Abdullah bin 'Abbas : Al-Fadl was riding behind the Prophet and a woman from the tribe of Khath'am came up. Al-Fadl started looking at her and she looked at him. The Prophet 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 a very old man and cannot sit properly on his Mount. Shall I perform Hajj on his behalf? The Prophet replied in the affirmative. That happened during Hajjat-ul-wada' of the Prophet.