Yetzer Hara

Yetzer Hara - The evil inclination in man.  In Jewish tradition, and in the view of some rabbis, the Yetzer Hara is the evil spirit itself, i.e., Satan.  This is how Rabbi Simeon ben Lakish, 3rd-century scholar, expressed it:  "The Yetzer Ra, Satan, and the angel of death are one and the same."  [Rf.  Universal Jewish Encyclopedia I, 303.]  (a)

Resource List - all entries are taken verbatim from the original source:

(a) "The Dictionary of Angels" by Gustav Davidson, © 1967