Mahabharata 4.32.46
ततो युधिष्ठिरो मत्स्यं पुनरेवाभ्यभाषतप्रतिनन्दामि ते वाक्यं मनोज्ञं मत्स्य भाषसे
tato yudhiṣṭhiro matsyaṃ punarevābhyabhāṣatapratinandāmi te vākyaṃ manojñaṃ matsya bhāṣase
Our plain-language meaning of this verse is waiting for scholar review.