Mahabharata 12.28.41

न दृष्टपूर्वं प्रत्यक्षं परलोकं विदुर्बुधाःआगमांस्त्वनतिक्रम्य श्रद्धातव्यं बुभूषता

na dṛṣṭapūrvaṃ pratyakṣaṃ paralokaṃ vidurbudhāḥāgamāṃstvanatikramya śraddhātavyaṃ bubhūṣatā

Our plain-language meaning of this verse is waiting for scholar review.