The heads of the latter family at that time were Saʻd b. Muʻādh and Usayd b. Ḥuḍayr. One day it happened that Muṣʻab was sitting together with Asʻad in this house of the Banū Ẓafar, engaged in instructing some new converts, when Saʻd b. Muʻādh, having come to know of their whereabouts, said to Usayd b. Ḥuḍayr: “Drive out these fellows who have come into our houses to make fools of the weaklings among us; I would spare thee the trouble did not the tie of kinship between me and Asʻad prevent my doing him any harm” (for he himself was the cousin of Asʻad). Hereupon Usayd took his spear and, bursting in upon Asʻad and Muṣʻab, “What are you doing?” he cried, “leading weak-minded folk astray? If you value your lives, begone hence.” “Sit down and listen,” Muṣʻab answered quietly, “if thou art pleased with what thou hearest, accept it; if not, then leave it.” Usayd stuck his spear in the ground and sat down to listen, while Muṣʻab expounded to him the fundamental doctrines of Islam and read several passages of the Qurʼān. After a time Usayd, enraptured, cried, “What must I do to enter this religion?” “Purify thyself with water,” answered Muṣʻab, “and confess that there is no god but God and that Muḥammad is the apostle of God.” Usayd at once complied and repeated the profession of faith, adding, “After me you have still another man to convince” (referring to Saʻd b. Muʻādh). “If he is persuaded, his example will bring after him all his people. I will send him to you forthwith.” With these words he left them, and soon after came Saʻd b. Muʻādh himself, hot with anger against Asʻad for the patronage he had extended to the missionaries of Islam. Muṣʻab begged him not to condemn the new faith unheard, so Saʻd agreed to listen and soon the words of Muṣʻab touched him and brought conviction to his heart, and he embraced the faith and became a Muslim. He went back to his people burning with zeal and said to them, “Sons of ʻAbd al-Ashhal, say, what am I to you?” “Thou art our lord,” they answered, “thou art the wisest and most illustrious among us.” “Then I swear,” replied Saʻd, “nevermore to speak to any of you until you believe in God and Muḥammad, His apostle.” And from that day, all the descendants of ʻAbd al-Ashhal embraced Islam. [23] With such zeal and earnestness was the preaching of the faith pushed forward that within a year there was not a family among the Arabs of Medina that had not given some of its members to swell the number of the faithful, with the exception of one branch of the Banū Aws, which held aloof under the influence of Abū Qays b. al-Aslat, the poet.