3 Enoch is an Old Testament Apocryphal book. 3 Enoch purports to have been written in the 2nd century CE, but its origins can only be traced to the 5th century. Other names for 3 Enoch include "The Third Book of Enoch", "The Book of the Palaces", "The Book of Rabbi Ishmael the High Priest" and "The Revelation of Metatron". Most commonly, the Book of Enoch refers to 1 Enoch, which survived completely only in the Ethiopic language. There is also a 2 Enoch, which has survived only in Old Slavonic.