Mahabharata 3.6.2

सरस्वतीदृषद्वत्यौ यमुनां च निषेव्य तेययुर्वनेनैव वनं सततं पश्चिमां दिशम्

sarasvatīdṛṣadvatyau yamunāṃ ca niṣevya teyayurvanenaiva vanaṃ satataṃ paścimāṃ diśam

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