Mahabharata 13.106.6

तं दृष्ट्वा स वचः प्राह ब्रह्मा राजन्भगीरथम्कथं भगीरथागास्त्वमिमं देशं दुरासदम्

taṃ dṛṣṭvā sa vacaḥ prāha brahmā rājanbhagīrathamkathaṃ bhagīrathāgāstvamimaṃ deśaṃ durāsadam

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