Prophet Muhammad, sallallahu ^alayhi wa sallam, received the revelation in Makkah and therein he was ordered to teach and spread among a society drowning in ignorance the rules of Islam, the religion of all the Prophets, so that excellence, justice and peace prevail and winning the hereafter may be achieved. The people at that time used to worship idols, buyy their newly born female daughters while alive and commit many acts of wickedness and debauchery; They were devoted to an immoral style of living that opposed the proper manners and ethics taught by the Prophets of Allah
Allah the Exalted has sent His Prophet Muhammad, sallallahu ^alayhi wa sallam, with guidancec to renew the call for Islam. During the the prime trading season the Prophet used to pass among the people in Makkah and tell them: "Say La ilaha illallah (There is no God except Allah) and you will win." He brought them the good news of the great reward for those who believed and warned those who did not believe a severe torture in the hereafter.
In the outset of his Call a few people believed in him but the majority renounced his Call and denied his prophethood. However, the Messenger of Allah, sallallahu ^alayhi wa sallam, persisted and eventually met in Makkah some people of Yathrib (Madinah) from the tribes of Al-'Aws and al-Khazraj; he invited them to embrace Islam so six of them accepted at first. When they left to go to Madinah, he sent with them Umm Maktub and Mus^ab ibn ^Umayr to teach the Qur'an to the oneness who believed and to call upon the ones who did not embrace Islam to do so, hence, their number increased by the following year.