Mahabharata 5.108.9

अत्र मूलं हिमवतो मन्दरं याति शाश्वतम्अपि वर्षसहस्रेण न चास्यान्तोऽधिगम्यते

atra mūlaṃ himavato mandaraṃ yāti śāśvatamapi varṣasahasreṇa na cāsyānto'dhigamyate

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