I performed Hajj along with Messenger of Allah ﷺ on the occasion of the Farewell Pilgrimage and saw him when he flung pebbles at Jamrat al-'Aqaba and returned while he was riding the camel, and Bilal and Usama were with him. One of them was leading his camel, while the other was raising his cloth over the head of Messenger of Allah ﷺ to protect him from the sun. She (further) said: Messenger of Allah ﷺ said so many things, and I heard him saying: If a slave having some limb of his missing and having dark complexion is appointed to govern you according to the Book of Allah the Exalted. listen to him and obey him.  

سَمِعْتُهَا تَقُولُ حَجَجْتُ مَعَ رَسُولِ اللَّهِ ﷺ حَجَّةَ الْوَدَاعِ فَرَأَيْتُهُ حِينَ رَمَى جَمْرَةَ الْعَقَبَةِ وَانْصَرَفَ وَهُوَ عَلَى رَاحِلَتِهِ وَمَعَهُ بِلاَلٌ وَأُسَامَةُ أَحَدُهُمَا يَقُودُ بِهِ رَاحِلَتَهُ وَالآخَرُ رَافِعٌ ثَوْبَهُ عَلَى رَأْسِ رَسُولِ اللَّهِ ﷺ مِنَ الشَّمْسِ قَالَتْ فَقَالَ رَسُولُ اللَّهِ ﷺ قَوْلاً كَثِيرًا ثُمَّ سَمِعْتُهُ يَقُولُ إِنْ أُمِّرَ عَلَيْكُمْ عَبْدٌ مُجَدَّعٌ حَسِبْتُهَا قَالَتْ أَسْوَدُ يَقُودُكُمْ بِكِتَابِ اللَّهِ تَعَالَى فَاسْمَعُوا لَهُ وَأَطِيعُوا  

[Machine] I performed the farewell pilgrimage with the Messenger of Allah ﷺ, and I saw either Usama or Bilal leading the Messenger of Allah's camel by its reins, and the other one raising his garment to cover him from the heat until he threw the pebbles at Al-Aqaba. Then he turned and the people stood up. He placed his garment from under his right armpit on his left shoulder. I saw beneath his right sleeve a patch resembling a collection [of lice]. Then he mentioned many things, and he used to say, ﷺ, "If a slave who is a Muja'adh comes to you with the Book of Allah, listen and obey. Have I conveyed (the message)?"  

حَجَجْتُ مَعَ رَسُولِ اللَّهِ ﷺ حَجَّةَ الْوَدَاعِ فَرَأَيْتُ أُسَامَةَ أَوْ بِلَالًا يَقُودُ بِخِطَامِ نَاقَةِ رَسُولِ اللَّهِ ﷺ وَالْآخَرَ رَافِعُ ثَوْبَهُ يَسْتُرُهُ بِهِ مِنَ الْحَرِّ حَتَّى رَمَى جَمْرَةَ الْعَقَبَةِ ثُمَّ انْصَرَفَ فَوَقَفَ النَّاسُ وَقَدْ جَعَلَ ثَوْبَهُ مِنْ تَحْتِ إِبْطِهِ الْأَيْمَنِ عَلَى عَاتِقِهِ الْأَيْسَرِ قَالَ فَرَأَيْتُ تَحْتَ غُضْرُوفِهِ الْأَيْمَنِ كَهَيْئَةِ جُمْعٍ ثُمَّ ذَكَرَ قَوْلًا كَثِيرًا وَكَانَ فِيمَا يَقُولُ ﷺ «إِنْ أُمِّرَ عَلَيْكُمْ عَبْدٌ مُجَدَّعٌ أَسْوَدُ يَقُودُكُمْ بِكِتَابِ اللَّهِ فَاسْمَعُوا وَأَطِيعُوا» ثُمَّ قَالَ «هَلْ بَلَّغْتُ؟ »  

"عَنْ أُمِّ حُصَيْنٍ قَالَتْ: حَجَجْتُ مَعَ رَسُولِ اللهِ ﷺ حَجَّةَ الْوَدَاعِ، فَرَأَيْتُ أُسَامَةَ وَبِلَالًا يَقُودُ بِخطامِ رَاحِلَةِ رَسُولِ اللهِ ﷺ وَالآخَر رَافِعٌ ثوْبَهُ يَسْتُرُ بِهِ مِنَ الْحَرِّ حَتَّى رَمَى جَمْرَةَ الْعَقَبَةِ ثُمَّ انْصَرَفَ، فَوَقَفَ النَّاسُ وَقَدْ جَعَلَ ثَوْبَهُ تَحْتَ إِبْطِهِ عَلَى عَاتِقِهِ الأَيْسَرِ، فَرَأيْتُ عِنْدَ غُضْرُوفِهِ الأَيْمَنِ كَهَيْئَةِ جَمْعٍ ثُمَّ ذكَرَ قَوْلًا كَثِيرًا، ثُمَّ قَالَ: اللَّهُمَّ اشْهَدْ هَلْ بَلَّغْتُ؟ وَكَانَ فِيمَا يَقُولُ: إِنْ أُمِّرَ عَلَيْكُمْ عَبْدٌ مُجَدَّعٌ أَسْوَدُ يَقُودُكُمْ بِكِتَابِ اللهِ - تَعَالَى- فَاسْمَعُوا وَأَطِيعُوا".