When the Prophet began to preach the true religion, the whole community became his enemy and spared no pains to harass and persecute him, yet there was not a single pagan who doubted his honesty and trustworthiness. On the contrary, people used to bring and leave their money in his trust, they considered none in Makkah more honest and trust worthy than him. One purpose of the Holy Prophet (Sallallahu Alaihi Wa Sallam) in leaving Hadrat Ali behind on the occasion of his migration (to Madina) was indeed that he should return to every one their deposits before coming over to Madina. (Madarij -Un- Nabuwah)
The Makkan unbelievers persecuted the Holy Prophet (Sallallahu Alaihi Wa Sallam) and his followers incessantly for twenty one years. They left no stratagem unused to harass and trouble the worshippers of one ALLAAH and compelled them to leave their hearth and home. But when Makkah was conquered, these worst enemies of Islam were completely at the mercy of the Holy Prophet (Sallallahu Alaihi Wa Sallam) so much so that just a nod from him would have heads rolling on the dust: But what did actually take place? To the mighty chiefs of Quraish who stood before him bowing their head in fear and shame, the Holy Prophet posed a question, “ Do you know how I am going to deal with you today? “They replied in suppressed tones, “O Truthful and Trustworthy one! You are our noble brother and a noble brother’s son. We have ever found you merciful’.
The Holy Prophet (Sallallahu Alaihi Wa Sallam) accompanied by Hadrat Zaid Harisa went to Ta’if to preach oneness of ALLAAH, and invited the people to Islam, whereupon they got enraged and set about maltreating him. The chiefs instigated the local urchins to mischief. While he was preaching these rowdies pelted him with stones so heavily that he began to bleed profusely; the blood congealing in his shoes making it difficult for him to take out his feet for making ablution. On one occasion the rogues and vagabonds abused him, clapped hands and jeered at him so much that he was forced to seek shelter in a house. Once while preaching in the same town he received so many injuries that he fainted and fell down. Hadrat Zaid (Radi Allaahu Ta’ala Anhu) lifted him on his back: took him outside the habitation and sprinkled water on his face to bring him round.
And ALLAAH hath sent down unto thee the Book and wisdom, and hath taught thee that which thou knowest not; and the grace of ALLAAH on thee is ever might. 4/113
And presently thy Lord shall give unto thee so that thou shalt be well-pleased. 93/5
And We have not sent thee save as bearer of glad tidings and a warner unto all mankind; 34/28
Say thou: if ye are want to love ALLAAH, then follow me, and ALLAAH shall love you and forgive you your sins: And ALLAAH is Forgiving and Merciful. 3/31
Say thou as for me, my Lord hath guided me unto a straight path. 6/161
Say thou: O mankind! Verily I am the Messenger of ALLAAH unto you all – of Him whose is the dominion of the heavens and the earth. No god is there but He; He giveth life and causeth to die. 7/158
And whosoever opposeth the Messenger after the truth hath become manifest unto him, and followeth other way than that of the believers, we shall let him follow that to which he hath turned, and shall roast him in Hell an evil retreat. 4/115