Mahabharata 1.143.11

अहं हि मनसा ध्याता सर्वान्नेष्यामि वः सदावृजिने तारयिष्यामि दुर्गेषु च नरर्षभान्

ahaṃ hi manasā dhyātā sarvānneṣyāmi vaḥ sadāvṛjine tārayiṣyāmi durgeṣu ca nararṣabhān

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