120. That is, neither there is any mention of their deities in any revealed Book nor do they have any other source of knowledge about them nor any authority to worship them. Therefore, it is sheer ignorance that they have associated their self invented deities with Allah and worship them, make vows and offer sacrifices to them and supplicate them for their needs etc.
121. This is to warn the foolish people that they are absolutely wrong in expecting that their deities would help them in this world and in the Hereafter because they have no power to help them. Thus, they will find no helper, for Allah alone could help them and they have already displeased Him by their rebellious behavior.