The first reference to the devil in Genesis is found in Genesis 1:2 the rebellion. The Bible only names one entity by name that has already been judge for ‘death’ on judgment day the devil, and he knows his time is short. There are a numbered of his disciples called fallen angels, that will ‘die’ upon the return of Christ. This bunch is referred to as the Sons of God in one place Genesis 6, the book of Jude gives more information. Among other prophets.
I asked ..did God know that Lucifer would “fail” that Adam would fail” before hand?