Mahabharata 5.10.20

ऋषिवाक्यं निशम्याथ स वृत्रः सुमहाबलःउवाच तांस्तदा सर्वान्प्रणम्य शिरसासुरः

ṛṣivākyaṃ niśamyātha sa vṛtraḥ sumahābalaḥuvāca tāṃstadā sarvānpraṇamya śirasāsuraḥ

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