Q: Where can we get least or non-payable journal to which we can submit papers?

Thank you for your question. To find a journal with no article processing charges, you can try a search on doaj.org with a filter for “without article processing charges”. However, without examining your paper, it would be difficult to recommend a specific journal or set of journals.
Please note that some journals also agree to a total or partial waiver of publication fees, so you might want to read the fee waiver policy as well before you decide whether the journal will be suitable for you.