Mahabharata 12.79.20

भीष्म उवाच · bhīṣma uvāca

तपसा ब्रह्मचर्येण शस्त्रेण च बलेन चअमायया मायया च नियन्तव्यं तदा भवेत्

tapasā brahmacaryeṇa śastreṇa ca balena caamāyayā māyayā ca niyantavyaṃ tadā bhavet

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