What is the fate of those who never received the message of Islam, such as followers of ancient religions widespread in Asia, and were they obligated to follow the prophets who preceded them?

A believer should repel doubts by relying on the established fundamentals of faith. This is an example of referring the ambiguous to the clear, a characteristic of those firmly grounded in knowledge. Religion is one across all heavenly messages, though the branches of the laws differ. The law of Islam is the only universal and obligatory law for all humankind until the Day of Judgment, whereas previous prophets were sent specifically to their own peoples. The earth has never been devoid of one who stands for Allah with a proof over His creation. The belief that Eastern scriptures lack prophecies about the Prophet Muhammad, peace be upon him, is incorrect; their books, such as the Torah and the Gospel, contain many clear prophecies.