Mahabharata 9.35.24

तेषामागच्छतां रात्रौ पथिस्थाने वृकोऽभवत्तथा कूपोऽविदूरेऽभूत्सरस्वत्यास्तटे महान्

teṣāmāgacchatāṃ rātrau pathisthāne vṛko'bhavattathā kūpo'vidūre'bhūtsarasvatyāstaṭe mahān

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