Footnote
Some researchers assert that Jude is quoting from the apocryphal Book of Enoch. However, R. C. H. Lenski notes: “We ask: ‘What is the source of this patchwork, the Book of Enoch?’ This book is an accretion, and nobody is sure of the dates of its various parts . . . ; nobody can be sure that some of its expressions were not, perhaps, taken from Jude himself.”