Daniel was a Jewish prophet who lived during the time of the exile of the Jews in Babylon. He was a talented man who was able to interpret dreams, and so became an important figure in the court of the Babylonian, and later the Persian, kings. Daniel was a man of great faith, who spread the word of God by surviving punishments such as being thrown into the lions' den and by fearlessly refusing to worship any other god but the true God.
The events of Daniel's life are recorded in the Book of Daniel, which is found in the Old Testament among the major prophets. Some parts of the Book of Daniel are part of the Apocrypha rather than the main Bible.