The “Third Book of Enoch”, abbreviated as “3 Enoch” and also known as “The Book of the Palaces, The Book of Rabbi Ishmael the High Priest”, or “The Revelation of Metatron”
From 3 Enoch or The Hebew Book of Enoch, by Hugo Odeberg [1928]
“The Third Book of Enoch” (Hebrew: ספר חנוך לר׳ ישמעאל כ׳׳ג, abbreviated as 3 Enoch) is a Biblical apocryphal book in Hebrew. 3 Enoch purports to have been written in the 2nd century, but its origins can only be traced to the 5th century. Other names for 3 Enoch include “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 Ge’ez. There is also a Second Book of Enoch, which has survived only in Old Slavonic, although Coptic fragments were also identified in 2009. None of the three books are considered canonical scripture by the majority of Jewish or Christian bodies.
The name “3 Enoch” was coined by Hugo Odeberg for his first critical edition of 1928. The oldest printed text of 3 Enoch appears to be the Derus Pirqe Hekalot. It covers 3:1–12:5 and 15:1–2, and it is dated by Arthur Ernest Cowley to around 1650.