Mahabharata 5.177.7

अम्बोवाचजहि भीष्मं रणे राम मम चेदिच्छसि प्रियम्प्रतिश्रुतं च यदि तत्सत्यं कर्तुमिहार्हसि

ambovācajahi bhīṣmaṃ raṇe rāma mama cedicchasi priyampratiśrutaṃ ca yadi tatsatyaṃ kartumihārhasi

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