Mahabharata 13.8.16

कर्मणा मनसा वापि वाचा वापि परंतपयन्मे कृतं ब्राह्मणेषु तेनाद्य न तपाम्यहम्

karmaṇā manasā vāpi vācā vāpi paraṃtapayanme kṛtaṃ brāhmaṇeṣu tenādya na tapāmyaham

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