Mahabharata 12.224.53
तपो निःश्रेयसं जन्तोस्तस्य मूलं दमः शमःतेन सर्वानवाप्नोति यान्कामान्मनसेच्छति
tapo niḥśreyasaṃ jantostasya mūlaṃ damaḥ śamaḥtena sarvānavāpnoti yānkāmānmanasecchati
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book