Mahabharata 12.160.83

अग्र्यः प्रहरणानां च खड्गो माद्रवतीसुतमहेश्वरप्रणीतश्च पुराणे निश्चयं गतः

agryaḥ praharaṇānāṃ ca khaḍgo mādravatīsutamaheśvarapraṇītaśca purāṇe niścayaṃ gataḥ

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