The Jews didn't believe in a "hell" until they were conquered by Alexander and he brought in tales of a place called Tarturus. Everywhere you see the word "hell" in the OT, it refers to Sheol, which is simply the grave. Everyone goes there.
The scriptures clearly states God has prepared a place for Satan & his angels. That isn't a "grave". Even relevation spoke of whoever was not found in the book of life was casted into the lake of fire. Again that's not a grave.