Muwatta Imam Malik Book of Hajj, Hadith 98
Yahya related to me from Malik from Ibn Shihab from Sulayman ibn Yasar that Abdullah ibn Abbas said, "Al-Fadl ibn Abbas was riding behind the Messenger of Allah ﷺ when a woman from the Khathama tribe came to him to ask him for a fatwa. Al-Fadl began to look at her, and she at him, and the Messenger of Allah ﷺ turned Fadl's face away to the other side. The woman said, 'Messenger of Allah, Allah's making the hajj obligatory finds my father a very old man, unable to stay firm on his riding-beast. Can I do hajj for him?', and he said, 'Yes.' This was during the farewell hajj."
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، قَالَ كَانَ الْفَضْلُ بْنُ عَبَّاسٍ رَدِيفَ رَسُولِ اللَّهِ ﷺ فَجَاءَتْهُ امْرَأَةٌ مِنْ خَثْعَمَ تَسْتَفْتِيهِ فَجَعَلَ الْفَضْلُ يَنْظُرُ إِلَيْهَا وَتَنْظُرُ إِلَيْهِ فَجَعَلَ رَسُولُ اللَّهِ ﷺ يَصْرِفُ وَجْهَ الْفَضْلِ إِلَى الشِّقِّ الآخَرِ فَقَالَتْ يَا رَسُولَ اللَّهِ إِنَّ فَرِيضَةَ اللَّهِ فِي الْحَجِّ أَدْرَكَتْ أَبِي شَيْخًا كَبِيرًا لاَ يَسْتَطِيعُ أَنْ يَثْبُتَ عَلَى الرَّاحِلَةِ أَفَأَحُجُّ عَنْهُ قَالَ " نَعَمْ " . وَذَلِكَ فِي حَجَّةِ الْوَدَاعِ .