The next year, i.e. 12 Nabawi, on the occasion of Hajj, 12 men from Madinah accepted Islam secretly on the same valley in Mina and pledged allegiance [i.e. Bay’at] to the Holy Nabi
صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم . In Islamic history, it is known as ‘Bay’at-e-’Uqbah Aula’.
They also requested the Greatest and the Noblest Nabi صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم to send anyone who could teach Islamic commandments and rulings to them. Therefore, the Revered and Renowned Rasool صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم sent Sayyiduna Mus’ab Bin ‘Umayr رَضِىَ اللهُ تَعَالٰی عَـنْهُto Madinah along with them. He رَضِىَ اللهُ تَعَالٰی عَـنْهُstayed in Madinah at the home of Sayyiduna As’ad Bin Zurarah رَضِىَ اللهُ تَعَالٰی عَـنْهُand went to each and every home of the Ansaar, preaching them about Islam. Every day, one or two new persons joined the fold of Islam. Gradually, Islam spread from Madinah to Quba at each and every home.
The chief of the Aws tribe was Sayyiduna Sa’d Bin Mu’aaz رَضِىَ اللهُ تَعَالٰی عَـنْهُwho was very brave and influential. Sayyiduna Mus’ab Bin ‘Umayr رَضِىَ اللهُ تَعَالٰی عَـنْهُinvited him to Islam. At first, he expressed hatred and turned down his invitation but his heart melted when Sayyiduna Mus’ab Bin ‘Umayr
رَضِىَ اللهُ تَعَالٰی عَـنْهُrecited the Holy Quran to him. He became so impressed that he accepted Islam. After he became Muslim, his tribe ‘Aws’ also embraced Islam.
The same year on 27th night of Rajab, according to a strong opinion, the Beloved and Blessed Nabi صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم was blessed with Mi’raaj [i.e. the Ascension] with his blessed body in the state of wakefulness. During the same journey of the Ascension, five Salahs were declared Fard, which would be described in detail in the chapter of Mu’jizaat [i.e. miracles],اِنْ شَــآءَ الـلّٰـه عَزَّوَجَلَّ.