Mahabharata 5.43.36

सर्वार्थानां व्याकरणाद्वैयाकरण उच्यतेप्रत्यक्षदर्शी लोकानां सर्वदर्शी भवेन्नरः

sarvārthānāṃ vyākaraṇādvaiyākaraṇa ucyatepratyakṣadarśī lokānāṃ sarvadarśī bhavennaraḥ

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