Although the Ansaar were previously idol-worshippers, they knew because of intermingling [i.e. mixing] with the Jews that the Last and the Final Nabi صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم was going to be sent in the world. The Jews would often threaten that they would join the army of the Last Nabi after the declaration of his Nubuwwah and would wipe the Aws and the Khazraj off the face of the earth because of their idol-worship. For this reason, these two tribes as well as the Jews were waiting for the Last Nabi صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم .
In 11 Nabawi, the Beloved and Blessed Nabi صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم went to Mina as usual in order to invite Arab tribes to Islam who had come to perform Hajj. He صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم recited the Ayahs of the Holy Quran to people, inviting them to Islam. He صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم was present in Mina near the ‘Uqbah valley where the Masjid ‘Uqbah is situated today. Meanwhile, six men from the tribe of Khazraj came to him. He صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم asked them about their name and family background. Then, reciting some Ayahs of the Holy Quran, he صَلَّی اللّٰہُ تَعَالٰی عَلَیْہِ وَاٰلِہٖ وَسَلَّم invited them to Islam. They were very impressed with it and said to each other, ‘He is certainly the Last Nabi the Jews had been giving the good news about. We should accept Islam without delay in case the Jews accept it before us.’ Saying this, all of them became Muslims together. Having come to Madinah, they also invited their families and relatives to Islam. The names of those six fortunate individuals were as follows: