Mahabharata 1.188.19

यथायं विहितो धर्मो यतश्चायं सनातनःयथा च प्राह कौन्तेयस्तथा धर्मो न संशयः

yathāyaṃ vihito dharmo yataścāyaṃ sanātanaḥyathā ca prāha kaunteyastathā dharmo na saṃśayaḥ

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