Mahabharata 12.215.25

यथा वेदयते कश्चिदोदनं वायसो वदन्एवं सर्वाणि कर्माणि स्वभावस्यैव लक्षणम्

yathā vedayate kaścidodanaṃ vāyaso vadanevaṃ sarvāṇi karmāṇi svabhāvasyaiva lakṣaṇam

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