Mahabharata 3.13.116

यत्समर्थं पाण्डवानां तत्करिष्यामि मा शुचःसत्यं ते प्रतिजानामि राज्ञां राज्ञी भविष्यसि

yatsamarthaṃ pāṇḍavānāṃ tatkariṣyāmi mā śucaḥsatyaṃ te pratijānāmi rājñāṃ rājñī bhaviṣyasi

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