Mahabharata 3.61.17

तस्मादर्हसि शत्रुघ्न सत्यं कर्तुं नरेश्वरउक्तवानसि यद्वीर मत्सकाशे पुरा वचः

tasmādarhasi śatrughna satyaṃ kartuṃ nareśvarauktavānasi yadvīra matsakāśe purā vacaḥ

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