Mahabharata 13.116.25

अहिंसा परमो धर्मस्तथाहिंसा परं तपःअहिंसा परमं सत्यं ततो धर्मः प्रवर्तते

ahiṃsā paramo dharmastathāhiṃsā paraṃ tapaḥahiṃsā paramaṃ satyaṃ tato dharmaḥ pravartate

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