-->
At that time the Arabs followed a form of idolatry, each tribe keeping its own idols at the Ka'bah, the cubical structure built originally by Abraham to celebrate the glory of the One God. But the monotheistic message of Abraham had long become forgotten among the general population of the Arabian peninsula. The young Muhammad, however, was a believer in the One God all of his life and never participated in the idolatrous practices of his tribe.
When forty years old, during one of the retreats which he made habitually in a cave on top of a mountain outside Makkah, Muhammad first saw the archangel Gabriel who revealed God's Word to him, the Quran, and announced that Muhammad is the messenger of God. For the next thirteen years he preached the Word of God to the Makkans, inviting them to abandon idolatry and accept the religion of Oneness. A few accepted his call but most Makkans, especially those of his own tribe, opposed him violently, seeing in the new religion a grave danger to their economic as well as social domination based upon their control of the Ka'bah. But the Prophet continued to call the people to Islam and gradually a larger number of men and women began to accept the faith and submit themselves to its teachings. As a result, persecution of Muslims increased until the Prophet was forced to send some of his companions to Abyssinia where they were protected by the Christian king.
The Makkan period was also one of intense spiritual experience for the Prophet and the noble companions who formed the nucleus of the new religious community which was soon to spread worldwide. It was during this period that God ordered the direction of prayers to be changed from Jerusalem to Makkah. To this day Jerusalem remains along with Makkah and Madinah one of the holiest cities of Islam.
In 622 A. D. the Prophet was ordered by God to migrate to Yathrib, a city north of Makkah. He followed the Divine Command and left with his followers for that city which henceforth was known as "The City of the Prophet" (Madinat al-nabi) or simply Madinah. This event was so momentous that the Islamic calendar begins with this migration (hijrah).
In Madinah, the Prophet established the first Islamic society which has served as the model for all later Islamic societies. Several battles took place against the invading Makkans which the Muslims won against great odds. Soon more tribes began to join Islam and within a few years most of Arabia had embraced the religion of Islam.
After many trials and eventually successive victories, the Prophet returned triumphantly to Makkah where the people embraced Islam at last. He forgave all his former enemies and marched to the Ka'bah, where he ordered his companion and cousin 'Ali to join him in destroying all the idols. The Prophet reconstituted the rite of pilgrimage as founded by Abraham. The Prophet then returned to Madinah and made another pilgrimage to Makkah. It was upon returning from this last pilgrimage that he delivered his farewell address. Soon he fell ill and after three days died in 632 A. D. in Madinah where he was buried in the chamber of his house next to the first mosque of Islam.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari