Believers of Islam are called Muslims. They believe that the Quran was spoken to Muhammad by the angel Gabriel, and that it is the word of Allah. They view Muhammad as a prophet. Other beliefs surah baqarah in hindi pdf rules about what Muslims should do come from reports of what Muhammad taught, or hadith.
They believe that all these prophets were given messages by God of the oneness of God to their communities at different times in history of mankind, but Satan made the past communities deviate from the message of oneness and other social codes. Allah as mentioned in the Quran and is the final message of God for all of mankind until the day of judgment. Most Muslims belong to one of two groups. But there are many more groups like the Alevis in Turkey.