Mahabharata 3.149.47

स्वेभ्यश्चैव परेभ्यश्च कार्याकार्यसमुद्भवाबुद्धिः कर्मसु विज्ञेया रिपूणां च बलाबलम्

svebhyaścaiva parebhyaśca kāryākāryasamudbhavābuddhiḥ karmasu vijñeyā ripūṇāṃ ca balābalam

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