I have heard that Zoroastrianism was the first monotheistic religion and had a huge effect on the Bible. I believe the concept of evil and good in the Bible comes from Zoroastrianism but I don't know the details. Could someone further expand on it?
Greetings. Not to discourage further responses, but do check out this older answer :
Was Zoroastrianism the source for Christianity? by the legendary u/lcnielsen
Hope this helps.