Some of the friends of the prophet Daniel mentioned in the Bible include Shadrach, Meshach, and Abednego, who were also known as Hananiah, Mishael, and Azariah. These friends were fellow Israelites who were taken into captivity in Babylon along with Daniel. They were known for their faithfulness to God and their refusal to bow down to the golden image set up by King Nebuchadnezzar.