"The Prophet ﷺ sent Abu Bakr with the (announcement of) Bara'ah (the declaration to publicize the disavowal of the idolaters). Then he summoned him and said: 'It is not right for anyone to convey this except a man among my family.'"So he called for 'Ali and gave it to him." (Using translation from Tirmidhī 3090)   

بَعَثَ النَّبِيُّ ﷺ بِبَرَاءَةَ مَعَ أَبِي بَكْرٍ ثُمَّ دَعَاهُ فَقَالَ «لَا يَنْبَغِي أَنْ يُبَلِّغَ هَذَا إِلَّا رَجُلٌ مِنْ أَهْلِي» فَدَعَا عَلِيًّا فَأَعْطَاهُ إِيَّاهُ  

[Machine] The Messenger of Allah ﷺ sent Baraa'ah to the people of Mecca with Abu Bakr, and then Ali followed him. He said to him, "Take the book and deliver it to the people of Mecca." Ali said, "I caught up with him and took the book from him, and Abu Bakr left while he was sad." He said, "O Messenger of Allah, was something revealed about me?" He said, "No, I was commanded to inform him, either me or a man from my family."  

أَنَّ رَسُولَ اللهِ ﷺ بَعَثَ بِبَرَاءَةَ إِلَى أَهْلِ مَكَّةَ مَعَ أَبِي بَكْرٍ ثُمَّ أَتْبَعَهُ بِعَلِيٍّ فَقَالَ لَهُ «خُذِ الْكِتَابَ فَامْضِ بِهِ إِلَى أَهْلِ مَكَّةَ» قَالَ «فَلَحِقْتُهُ فَأَخَذْتُ الْكِتَابَ مِنْهُ فَانْصَرَفَ أَبُو بَكْرٍ وَهُوَ كَئِيبٌ» فَقَالَ يَا رَسُولَ اللهِ أُنْزِلَ فِيَّ شَيْءٌ؟ قَالَ «لَا إِنِّي أُمِرْتُ أَنْ أُبَلِّغَهُ أَنَا أَوْ رَجُلٌ مِنْ أَهْلِ بَيْتِي»  

[Machine] The Messenger of Allah, ﷺ , sent Abu Bakr with a letter, and when he was on part of the way, he sent Ali and asked for it back. Then he took it from him and proceeded on his way until he found Abu Bakr. He said to himself, "The Messenger of Allah, ﷺ , said, 'Nobody will convey my message except me or someone from my own family.'"  

بَعَثَ رَسُولُ اللهِ ﷺ أَبَا بَكْرٍ بِبَرَاءَةَ حَتَّى إِذَا كَانَ بِبَعْضِ الطَّرِيقِ أَرْسَلَ عَلِيًّا فَأَخَذَهَا مِنْهُ ثُمَّ سَارَ بِهَا فَوَجَدَ أَبُو بَكْرٍ فِي نَفْسِهِ فَقَالَ قَالَ رَسُولُ اللهِ ﷺ «إِنَّهُ لَا يُؤَدِّي عَنِّي إِلَّا أَنَا أَوْ رَجُلٌ مِنِّي»  

when the Prophet came back from the Umrah of Al-Jirranah, he sent Abu Bakr to lead the Hajj. We wnet the him until, when he was in Al-Urj, the Iqamah for Subh was said, and he stood up to say the Takbir while he heard the grunting of a camel behind him, and he did not say the Takbir. He said: "This is the grunting of the camel of the Messenger of Allah has had second thoughts about the Hajj, and may be he is here, and we will pray with him." But it was 'Ali on the camel. Abu Bakr said to him: "(Have you come) as a leader or as messenger?" He said: "No, as a messenger, sent by the Messenger of Allah with a declaration of innocence to recite it to the people in the stations of Hajj. So we came to makkah and one day before the day of At-Tarwiyah Abu Bakr, may Allah be pleased with him, stood up and addressed the people telling them about their rituals. When he finished, Ali, may Allah be pleased with him, stood up and recited the declaration of innocence to the people until he finished it. Then we went out with hm and on the day of Arafat. Abu Bakr stood up and addressed people, telling them about rituals. When he finished, Ali, may Allah be pleased with him, stood up and recited the declaration of innocence to the people until he finished it. Then on the day of Sacrifice, we departed (Ifadah) and when Abu Bakr came back, eh addressed the people, telling them about their departure (Ifadah), sacrifice and rituals. When he finished, Ali, may Allah be pleased with him, stood up and recited the declaration of innocence to the people until he finished it. On the first day of An-Nafr (The 12th of Dhul-Hijjah), Abu Bakr stood up and addressed the people, telling them how to offer their sacrifice and how to stone the Jamrat, and teaching them their rituals. When he had finished, "Ali, may Allah be pleased with him, stood up and recited the declaration of innocence to the people until he finished it. (Daif) Abu Abdur-Rahman (An-Nasai) said: Ibn Khuthaim is not strong in Hadith, and I only narrated this so it would not be considered to be from Ibn Juraij from Abu Az-Zubai. And we did not write it except from Ishaq bin Rahuyah bin Ibrahm. And yahya bin Saeed Al-Qattan did not abandon the narrations of Ibn Khuthaim, or dod Abdur-Rahamn. However, Ali bin Al-Madini said: "Ibn Khuthaim is Munkar in Hadith," and Ali bin Al-Madini is more knowledgeable of Hadith. (Using translation from Nasāʾī 2993)   

أَنَّ النَّبِيَّ ﷺ حِينَ رَجَعَ مِنْ عُمْرَةِ الْجِعْرَانَةِ بَعَثَ أَبَا بَكْرٍ عَلَى الْحَجِّ فَأَقْبَلْنَا مَعَهُ حَتَّى إِذَا كُنَّا بِالْعَرْجِ ثُوِّبَ بِالصُّبْحِ ثُمَّ اسْتَوَى لِيُكَبِّرَ فَسَمِعَ الرَّغْوَةَ خَلْفَ ظَهْرِهِ فَوَقَفَ عَنِ التَّكْبِيرِ فَقَالَ هَذِهِ رَغْوَةُ نَاقَةِ رَسُولِ اللهِ ﷺ لَقَدْ بَدَا لِرَسُولِ اللهِ ﷺ فِي الْحَجِّ فَلَعَلَّهُ أَنْ يَكُونَ رَسُولُ اللهِ ﷺ فَنُصَلِّي مَعَهُ فَإِذَا عَلِيٌّ عَلَيْهَا فَقَالَ لَهُ أَبُو بَكْرٍ أَمِيرٌ أَمْ رَسُولٌ؟ فَقَالَ «لَا بَلْ رَسُولٌ أَرْسَلَنِي رَسُولُ اللهِ ﷺ بِبَرَاءَةَ أَقْرَؤُهَا عَلَى النَّاسِ فِي مَوَاقِفِ الْحَجِّ» فَقَدِمْنَا مَكَّةَ فَلَمَّا كَانَ قَبْلَ التَّرْوِيَةِ بِيَوْمٍ قَامَ أَبُو بَكْرٍ فَخَطَبَ النَّاسَ فَحَدَّثَهُمْ عَنْ مَنَاسِكِهِمْ حَتَّى إِذَا فَرَغَ قَامَ عَلِيٌّ فَقَرَأَ عَلَى النَّاسِ بَرَاءَةً حَتَّى خَتَمَهَا ثُمَّ خَرَجْنَا مَعَهُ حَتَّى إِذَا كَانَ يَوْمُ عَرَفَةَ قَامَ أَبُو بَكْرٍ فَخَطَبَ النَّاسَ فَحَدَّثَهُمْ عَنْ مَنَاسِكِهِمْ حَتَّى إِذَا فَرَغَ قَامَ عَلِيٌّ فَقَرَأَ عَلَى النَّاسِ سُورَةَ بَرَاءَةَ حَتَّى خَتَمَهَا ثُمَّ كَانَ يَوْمُ النَّحْرِ فَأَفَضْنَا فَلَمَّا رَجَعَ أَبُو بَكْرٍ خَطَبَ النَّاسَ فَحَدَّثَهُمْ عَنْ إِفَاضَتِهِمْ وَعَنْ نَحْرِهِمْ وَعَنْ مَنَاسِكِهِمْ فَلَمَّا فَرَغَ قَامَ عَلِيٌّ فَقَرَأَ عَلَى النَّاسِ بَرَاءَةً حَتَّى خَتَمَهَا فَلَمَّا كَانَ يَوْمُ النَّفَرِ الْأَوَّلِ قَامَ أَبُو بَكْرٍ فَخَطَبَ النَّاسَ فَحَدَّثَهُمْ كَيْفَ يَنْفِرُونَ وَكَيْفَ يَرْمُونَ فَعَلَّمَهُمْ مَنَاسِكَهُمْ فَلَمَّا فَرَغَ قَامَ عَلِيٌّ فَقَرَأَ عَلَى النَّاسِ بَرَاءَةً حَتَّى خَتَمَهَا