[Edited by Ellopos from Wikipedia articles.]
Septuagint is a witness for three more chapters not found in the Hebrew and Aramaic text of the book of Daniel. These chapters are found in the Greek / Septuagint version of the Old Testament, the earliest Greek translation, which reflects a text that is older than the Masoretic. These additions are accepted as canonical in the Roman Catholic, the Orthodox, and Syriac Bibles. Most Protestant Bibles exclude these passages as apocrypha.