Mahabharata 1.99.37

तस्मादहं त्वन्नियोगाद्धर्ममुद्दिश्य कारणम्ईप्सितं ते करिष्यामि दृष्टं ह्येतत्पुरातनम्

tasmādahaṃ tvanniyogāddharmamuddiśya kāraṇamīpsitaṃ te kariṣyāmi dṛṣṭaṃ hyetatpurātanam

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