Mahabharata 1.26.17

ततो निष्पुरुषं शैलं हिमसंरुद्धकन्दरम्अगम्यं मनसाप्यन्यैस्तस्याचख्यौ स कश्यपः

tato niṣpuruṣaṃ śailaṃ himasaṃruddhakandaramagamyaṃ manasāpyanyaistasyācakhyau sa kaśyapaḥ

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