What is the legal implication of the prohibition against using the right hand for Istinja?

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The prohibition against using the right hand for Istinja does not invalidate the purification, unlike the prohibition concerning dung or bones. The difference is that the prohibition against dung and bones relates to a condition of the act itself (lack of purity), rendering the act void, similar to using impure water for Wudu. Conversely, the prohibition against using the right hand pertains to the implement used, not the validity of the purification itself, similar to performing Wudu from a forbidden vessel.