As they came to the mouth of the Cave Abu Bakr whispered in...
As they came to the mouth of the Cave Abu Bakr whispered in the ear of the Prophet: "If one of them looks under his feet he will see us." The Prophet calmly replied: "Be not afraid God is with us." The Almighty protected His Prophet from his enemies and the historical Hijrah by which the faith of Islam and the Muslims were transferred from a state of weakness to a state of dignity and strength commenced.
The Magnitude of The Mission Let us try to evaluate ‘Ali's sacrifice and the magnitude of his mission. When the Prophet accepted the invitation of the Muslims of Medina the Muslims in Mecca numbered about 150. The Prophet permitted or rather urged these Muslims to migrate to Medina. He did that in spite of his awareness of the new danger which resulted from his covenant with the Medinites. He knew that the Meccans would not let him depart from their city safely.
He could have kept a number of prominent Muslims around him to shield him against the imminent danger. He could also commission any one of them to occupy his bed at such a time. But he did not do that; instead he urged them to leave Mecca ahead of him and kept ‘Ali for the hard task. He chose ‘Ali because he knew that an occupant of his bed that night must have the following qualities: His love to God His Messenger and His religion should be stronger than his love to himself.
He must be endowed with a courageous spirit that would enable him to face death for the Divine cause with satisfaction. He should have an indomitable spirit with which he would not be frightened by his aloneness while facing the violent wrath of the Meccan community because he foiled their plot against the Prophet. In addition to this he had to be patient enough to withhold all information about the Prophet regardless of what he might face of torture.
It was extremely difficult if not impossible to find a person other than ‘Ali ready to perform such a role and do it so calmly without fear. Here we may understand the meaning of the ministry and assistance which ‘Ali promised the Prophet ten years before the time of this event. Significance of the Delivery of the Trusts It is worthy to note that the Prophet commissioned ‘Ali with the delivery of the trusts to the Meccans. This clearly put in action what he promised ‘Ali of executorship.
The Messenger could have commissioned someone other than ‘Ali to deliver the trusts. ‘Ali's survival was highly in doubt because of his dangerous mission.