Mahabharata 3.82.142

तथा चम्पां समासाद्य भागीरथ्यां कृतोदकःदण्डार्कमभिगम्यैव गोसहस्रफलं लभेत्

tathā campāṃ samāsādya bhāgīrathyāṃ kṛtodakaḥdaṇḍārkamabhigamyaiva gosahasraphalaṃ labhet

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