tasyānanubhave pūrvaṃ durdharā hetvasiddhatā // tasyeti pitṛsambaddhasyānyatra kvacit pradeśe 'nanubhave satyasiddho hetuḥ syāt //
If there had been no prior experience of that [voice] - meaning the [voice] connected with the father - in some other place, the probans would be inadmissible.