Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

"Let the divines, therefore, assemble and choose unanimously one miracle, and let them stipulate in writing that once it has been performed they will no longer entertain any doubt, but will all acknowledge and confess the truth of this Cause. Let them seal that paper and bring it to Me. They must fix this as the criterion of truth: If it be performed, they should have no remaining doubt; and if not, We shall stand convicted of imposture." (9:8)

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