Mahabharata 12.285.34

जात्या प्रधानं पुरुषं कुर्वाणं कर्म धिक्कृतम्कर्म तद्दूषयत्येनं तस्मात्कर्म नशोभनम्

jātyā pradhānaṃ puruṣaṃ kurvāṇaṃ karma dhikkṛtamkarma taddūṣayatyenaṃ tasmātkarma naśobhanam

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