Mahabharata 3.200.51

तपो निःश्रेयसं जन्तोस्तस्य मूलं शमो दमःतेन सर्वानवाप्नोति कामान्यान्मनसेच्छति

tapo niḥśreyasaṃ jantostasya mūlaṃ śamo damaḥtena sarvānavāpnoti kāmānyānmanasecchati

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