To be fair, the crystal sphere thing doesn't appear in any Abrahamic holy books (that I know of)

Ok, I may have overreached with the "crystal" thing, but there are definitely several passages that refer to a solid dome separating two sections of the world. This dome is typically referred to as the "firmament", and is referred to in passages outside of Genesis on occasion.

As for the flat Earth, I admit that the claims there are weaker. The Bible manages "four corners of the Earth", but that could be a metaphor. The Devil also transports Jesus to the top of a tall mountain to show him "all the kingdoms of the Earth", but that could've been an illusion.