Mahabharata 3.256.17

तमुवाच ततो ज्येष्ठो भ्राता सप्रणयं वचःमुञ्चैनमधमाचारं प्रमाणं यदि ते वयम्

tamuvāca tato jyeṣṭho bhrātā sapraṇayaṃ vacaḥmuñcainamadhamācāraṃ pramāṇaṃ yadi te vayam

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