Mahabharata 3.203.18

बस्तिमूले गुदे चैव पावकः समुपाश्रितःवहन्मूत्रं पुरीषं चाप्यपानः परिवर्तते

bastimūle gude caiva pāvakaḥ samupāśritaḥvahanmūtraṃ purīṣaṃ cāpyapānaḥ parivartate

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