Narrated Anas bin Malik: "The Prophet (s.a.w.a.) 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 (as) and gave it to him."

Narrated Ibn 'Abbas: "The Messenger of Allah (s.a.w.a.) dispatched Abu Bakr ordering him to announce these statements. Then 'Ali (as) followed him. When Abu Bakr was at a particular road, he heard the heavy breathing of Al-Qiswa, the she camel of the Messenger of Allah (s.a.w.a.), so Abu Bakr appeared frightened because he thought that it was the Messenger of Allah (s.a.w.a.). When he saw that it was 'Ali (as), he gave him the letter of the Messenger of Allah (s.a.w.a.), and told 'Ali (as) to announce the statements. So he left to perform Hajj. During the day of At-Tashriq 'Ali (as) stood to announce: 'The protection of Allah and His Messenger (s.a.w.a.) is removed from every idolater. So travel in the land for four months. There is to be no idolater performing Hajj after this year, nor may anyone perform Tawaf around the House while naked. None shall enter Paradise but a believer.' 'Ali (as) was making the announcement, so when he became exhausted Abu Bakr would announce it."