"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."
بَعَثَ النَّبِيُّ ﷺ بِبَرَاءَةَ مَعَ أَبِي بَكْرٍ ثُمَّ دَعَاهُ فَقَالَ لاَ يَنْبَغِي لأَحَدٍ أَنْ يُبَلِّغَ هَذَا إِلاَّ رَجُلٌ مِنْ أَهْلِي فَدَعَا عَلِيًّا فَأَعْطَاهُ إِيَّاهَا قَالَ هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ مِنْ حَدِيثِ أَنَسِ بْنِ مَالِكٍ