Mahabharata 8.27.80
मद्रके संगतं नास्ति मद्रको हि सचापलःमद्रकेषु च दुःस्पर्शं शौचं गान्धारकेषु च
madrake saṃgataṃ nāsti madrako hi sacāpalaḥmadrakeṣu ca duḥsparśaṃ śaucaṃ gāndhārakeṣu ca
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book