Abu Talib (A.S.) before his death summoned his people near his bed and said, "I will to you all to treat Mohammad well. Because he is trustworthy and truthful. He possesses all good qualities and I can see that the poor and the down-trodden have gathered around him and have accepted his mission. The big ones from the Quraish are being humbled by him and the oppressed are rising. O people of Quraish help him, respect him and follow him. If I would have lived, I would have removed the sorrows of his life."
Abu Talib (A.S.) looked after Mohammad (S.A.W) for forty two years. The Prophet (S.A.W) often remembering Abu Talib (A.S.) said nobody dared to harm me as long as my uncle Abu Talib (A.S.) lived.
The love and affection what Mohammad (S.A.W) received from Abu Talib (A.S.) was given by him to Ali (A.S.). Mohammad (S.A.W) was shaping Ali (A.S.) to present him to the world as an ideal Muslim. Ali (A.S.) when first opened his eyes he saw Mohammad (S.A.W). When he breathed, he breathed in the company of Mohammad (S.A.W). When he first spoke he spoke to Mohammad (S.A.W).
The death of Abu Talib (A.S.) gave more courage to the enemies of Islam to harass the Prophet (S.A.W) and his followers. The embracing of Islam of some of the people of Yasrib (Madina) and the growing friendship between the Prophet (S.A.W) and the people of Yasrib had enhanced Islam. But then the Prophet (S.A.W) deputed Musayyab Ibne Aamir to teach them Quran and the percepts of Islam their number increased and more and more people began to visit Mecca to meet the Prophet (S.A.W). This alarmed the infidels so much that they decided to condition the activities of the Prophet (S.A.W) by making his life miserable.
When the Muslims of Yasrib saw that the life of their Prophet (S.A.W) was in danger they sent some seventy eight men and women to persuade him to immigrate to Madina with his followers. They promised him that not only would they pledge their allegiance to him but would also look after him and his followers as they take care of their own families. Encouraged by these assurances, of all those Muslims who could easily dispose off their belongings migrated to Madina and got themselves settled. This enraged the Meccan so much that they decided to kill the Prophet (S.A.W) lest he too migrates to Yasrib and makes their lives miserable from there. A close watch was kept on his movements, and under the leadership of Abu Jehal all the clans of Mecca met at Nadva to decide his fate. Some wanted to banish him, some wanted to put him in a cell having a small hole through which he could be given very little food so that he may die gradually. But these suggestions did not find much favour because they feared that if Mohammad (S.A.W) survived, he would certainly take revenge.
It was then decided to kill him in his own house. But who would do that? No individual was prepared to risk the Banu Hashims wrath. Therefore it was decided that each clan should provide one man from them to form a group of killers who would go and kill the Prophet (S.A.W). This collective action by the representatives of all the clans would also discourage the Hashmis from taking revenge and they then be persuaded to accept some monetary consideration for Mohammad (S.A.W)s blood. Accordingly one member of each clan surrounded the house of the Prophet (S.A.W) one night and waited for the dawn to enter the house and assassinate Mohammad (S.A.W). But Allah had revealed the conspiracy to His Apostle and ordered him to leave Mecca the same night.