Mahabharata 7.103.42

पुत्रशोकाभिसंतप्तश्चिकीर्षुः कर्म दुष्करम्जयद्रथवधान्वेषी प्रतिज्ञां कृतवान्हि यःकच्चित्स सैन्धवं संख्ये हनिष्यति धनंजयः

putraśokābhisaṃtaptaścikīrṣuḥ karma duṣkaramjayadrathavadhānveṣī pratijñāṃ kṛtavānhi yaḥkaccitsa saindhavaṃ saṃkhye haniṣyati dhanaṃjayaḥ

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