Mahabharata 3.83.69

तत्र त्रीण्यग्निकुण्डानि येषां मध्ये च जाह्नवीप्रयागादभिनिष्क्रान्ता सर्वतीर्थपुरस्कृता

tatra trīṇyagnikuṇḍāni yeṣāṃ madhye ca jāhnavīprayāgādabhiniṣkrāntā sarvatīrthapuraskṛtā

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