Sanskrit

उभयपट्टोद्ध्वट्टनान्महाशून्यताप्रवेशः ॥ ३॥

Transliteration

ubhayapaṭṭoddhvaṭṭanānmahāśūnyatāpraveśaḥ || 3 ||

Translation

By the friction of both boards (subject and object), entry into the Great Void occurs.

Word by Word

ubhaya (both/dual), paṭṭa (boards/slabs), uddhvaṭṭanāt (from the rubbing/friction/clashing), mahāśūnyatā (the Great Void), praveśaḥ (entry/penetration)