Mahabharata 3.198.32

न भक्षयामि मांसानि ऋतुगामी तथा ह्यहम्सदोपवासी च तथा नक्तभोजी तथा द्विज

na bhakṣayāmi māṃsāni ṛtugāmī tathā hyahamsadopavāsī ca tathā naktabhojī tathā dvija

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