Jin Gun Sampati Vrat

What is Jin Gun Sampati Vrat in Jainism, and what is its significance?
I have read about this vrat on quora and I think there is also a mention about it in a book on bheemsen charitrya.
If anyone knows about it?

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Source: Jainendra Siddhant Kosh, Vol. 2, Pg. 329.

Online link for the same