The Book of
Revelation was a Jewish writing more than 200 years older than 32 AD, when Jesus was crucified.
The first 3 chapter were from Jesus, but the rest was all the Jewish predictions.
Here are some of the research which was done to verify the facts.
Bibliography:
Bousset, Die Offenbarung Johannis, Göttingen, 1896 (written from an apologetic point of view and without familiarity with the rabbinical sources);
H. Gunkel, Schöpfung und Chaos, 1895, pp. 379-398;
P. Schmidt, Anmerkungen über die Komposition der Offenbarung Johannis;
E. Vischer, Die Offenbarung Johannis, Leipsic, 1886;
Fr. Spitta, Die Offenbarung des Johannis, Halle, 1889;
Weiss, Die Offenbarung des Johannis, ein Beitrag zur Literatur- und Religionsgesch. Göttingen, 1904;
J. Wellhausen, Skizzen und Vorarbeiten, 1899, iv. 215-234.
REVELATION (BOOK OF) - JewishEncyclopedia.com