Mahabharata 14.28.16

अहिंसा सर्वधर्माणामिति वृद्धानुशासनम्यदहिंस्रं भवेत्कर्म तत्कार्यमिति विद्महे

ahiṃsā sarvadharmāṇāmiti vṛddhānuśāsanamyadahiṃsraṃ bhavetkarma tatkāryamiti vidmahe

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