Hazrat Mus'ab (ra) bin Umair's Acceptance of Islam

This incident has been related in Sirat Khatamun-Nabiyin as follows:

“Dhul-Hijjah of 13 Nabawi, on the occasion of Hajj, many hundreds of people from the Aus and the Khazraj came to Mecca. Among them, there were 70 such people who had either become Muslim or now desired to become Muslim, and came to Mecca to meet the Holy Prophet (sa). Mus‘ab bin Umair (ra) was also among them. Mus‘ab’s (ra) mother was alive, and although she was an idolatress, she loved him very much. When she was informed of his coming, she sent word that, ‘First come and meet me, then go elsewhere.’ Mus‘ab (ra) responded, ‘I have not yet met the Holy Prophet (sa), I shall come to you once I have met him’ (he said this to his mother). Therefore, he presented himself before the Holy Prophet (sa) first, and briefed him on key issues, then visited his mother. She was very upset (that he did not visit her first). When she saw him, she began to weep and complain. Mus‘ab (ra) said, ‘Mother! I tell you something wonderful which is very beneficial for you, and shall put an end to every disagreement.’ She inquired, ‘What is that?’ Mus‘ab (ra) quietly responded, ‘This, that you forsake idol worship and become a Muslim, and believe in the Holy Prophet (sa).’ She was a firm idolatress, and as soon as she heard this, she began to put up a commotion saying, ‘I swear by the stars that I shall never enter your religion,’ and signalled her relatives to capture Mus‘ab (ra), however he was wise and quickly escaped.”