In the same year a less successful attempt was made by a new convert, Wāthilah b. al-Asqaʻ, to induce his clan to accept the faith that he himself had embraced after an interview with the Prophet. His father scornfully cast him off, saying, “By God! I will never speak a word to you again,” and none were found willing to believe the doctrines he preached with the exception of his sister, who provided him with the means of returning to the Prophet at Medina. [40] This ninth year of the Hijrah has been called the year of the deputations, because of the enormous number of Arab tribes and cities that now sent delegates to the Prophet, to give in their submission. The introduction into Arab society of a new principle of social union in the brotherhood of Islam had already begun to weaken the binding force of the old tribal ideal, which erected the fabric of society on the basis of blood-relationship. The conversion of an individual and his reception into the new society was a breach of one of the most fundamental laws of Arab life, and its frequent occurrence had acted as a powerful solvent on tribal organisation and had left it weak in the face of a national life so enthusiastic and firmly-knit as that of the Muslims had become. The Arab tribes were thus impelled to give in their submission to the Prophet, not merely as the head of the strongest military force in Arabia, but as the exponent of a theory of social life that was making all others weak and ineffective. [41] Muḥammad had succeeded in introducing into the anarchical society of his time a sentiment of national unity, a consciousness of rights and duties towards one another such as the Arabs had not felt before. [42] In this way, Islam was uniting together clans that hitherto had been continually at feud with one another, and as this great confederacy grew, it more and more attracted to itself the weaker among the tribes of Arabia. In the accounts of the conversion of the Arab tribes, there is continual mention of the promise of security against their enemies, made to them by the Prophet on the occasion of their submission. “Woe is me for Muḥammad!” was the cry of one of the Arab tribes on the news of the death of the Prophet. “So long as he was alive, I lived in peace and in safety from my enemies;” and the cry must have found an echo far and wide throughout Arabia.