What does the Bible say about prophets and their messages?

According to the Bible, a prophet is someone who speaks on behalf of God, conveying His messages to His people. A key indicator of a true prophet is that their prophecies come to pass, fulfilling God's revealed will. For example, Isaiah prophesied the coming of Cyrus, a king who would allow the Israelites to return from captivity, which was fulfilled hundreds of years later. The accuracy of these predictions highlights the divine origin of the prophets' messages and affirms the authority of Scripture as God's Word to us even today.