Mahabharata 15.35.17

सत्येन संवर्धयति दमेन नियमेन चअहिंसया च दानेन तपसा च सनातनः

satyena saṃvardhayati damena niyamena caahiṃsayā ca dānena tapasā ca sanātanaḥ

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