FALL OF ANGELS:

 https://www.jewishencyclopedia.com/articles/5998-fall-of-angels

But it is especially Samḥazai and Azael of whom the fall is narrated. In Targ. Pseudo-Jonathan to Gen. vi. 4 they appear as the "nefilim" (A. V. "giants"), undoubtedly in consequence of an incorrect interpretation of this word as "those that fell from heaven." The story of these two angels is found in brief form in Yalḳ., Gen. 44; it has been published by Jellinek ("B. H." iv. 127; originally in Midrash Abkir; comp. Rashi, Yoma 67b; Geiger, "Was Hat Mohammed aus dem Judenthume Aufgenommen?" p. 107).