عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ لَمَّا نَزَلَتْ عَشْرُ آيَاتٍ مِنْ بَرَاءَةٍ عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ دَعَا النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَبَا بَكْرٍ رَضِيَ اللَّهُ عَنْهُ فَبَعَثَهُ بِهَا لِيَقْرَأَهَا عَلَى أَهْلِ مَكَّةَ ثُمَّ دَعَانِي النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ لِي أَدْرِكْ أَبَا بَكْرٍ رَضِيَ اللَّهُ عَنْهُ فَحَيْثُمَا لَحِقْتَهُ فَخُذِ الْكِتَابَ مِنْهُ فَاذْهَبْ بِهِ إِلَى أَهْلِ مَكَّةَ فَاقْرَأْهُ عَلَيْهِمْ فَلَحِقْتُهُ بِالْجُحْفَةِ فَأَخَذْتُ الْكِتَابَ مِنْهُ وَرَجَعَ أَبُو بَكْرٍ رَضِيَ اللَّهُ عَنْهُ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ نَزَلَ فِيَّ شَيْءٌ قَالَ لَا وَلَكِنَّ جِبْرِيلَ جَاءَنِي فَقَالَ لَنْ يُؤَدِّيَ عَنْكَ إِلَّا أَنْتَ أَوْ رَجُلٌ مِنْكَ
It is narrated from Sayyiduna Ali (may Allah be pleased with him) that when ten verses of Surah Bara’ah were revealed, the Noble Prophet (peace and blessings be upon him) called Sayyiduna Abu Bakr (may Allah be pleased with him) and, giving him these verses, sent him to recite them before the people of Makkah. Then he (the Prophet) called me (Ali) and said: Go and join Abu Bakr; wherever you meet him, take this message from him and then go and recite it before the people of Makkah. So I met Sayyiduna Abu Bakr (may Allah be pleased with him) at Juhfa and took the letter from him. Then when Sayyiduna Abu Bakr (may Allah be pleased with him) returned to the Noble Prophet (peace and blessings be upon him), he asked: O Messenger of Allah! Has any command been revealed regarding me? The Prophet (peace and blessings be upon him) said: No, there is no command regarding you, but Jibreel (peace be upon him) came to me and said that either you should deliver the message yourself or someone from your family should deliver it.