As Imam ʿAlī continued to grow and mature, his dedication to Islam and  to his spiritual brother, Prophet Muḥammad also grew. The Prophet relied  upon Imam ʿAlī in critical junctures of the growth of Islam in Mecca,  such as inviting and cooking food for the invitation to the Quraysh to  Islam in the event known as Da’wat Dhu’l Asheerah. He also showed his  love for Islam and his dedication by sacrificing his life on the bed of  Prophet Muḥammad as he left on the migration towards Medina.