Mahabharata 13.36.16

भूमिरेतौ निगिरति सर्पो बिलशयानिवराजानं चाप्ययोद्धारं ब्राह्मणं चाप्रवासिनम्

bhūmiretau nigirati sarpo bilaśayānivarājānaṃ cāpyayoddhāraṃ brāhmaṇaṃ cāpravāsinam

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