Mahabharata 6.25.15

कर्म ब्रह्मोद्भवं विद्धि ब्रह्माक्षरसमुद्भवम्तस्मात्सर्वगतं ब्रह्म नित्यं यज्ञे प्रतिष्ठितम्

karma brahmodbhavaṃ viddhi brahmākṣarasamudbhavamtasmātsarvagataṃ brahma nityaṃ yajñe pratiṣṭhitam

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