sa taṁ praviṣṭaṁ vṛtam ātatāyibhir
bhaṭair anīkair avalokya mādhavaḥ
udyamya maurvaṁ parighaṁ vyavasthito
yathāntako daṇḍa-dharo jighāṁsayā
saḥ - He, Aniruddha; tam - him, Bāṇāsura; praviṣṭam - entered; vṛtam - surrounded; ātatāyibhiḥ - who were carrying weapons; bhaṭaiḥ - by guards; anīkaiḥ - numerous; avalokya - seeing; mādhavaḥ - Aniruddha; udyamya - raising; maurvam - made of muru iron; parigham - His club; vyavasthitaḥ - standing firm; yathā - like; anṭakaḥ - death personified; daṇḍa - the rod of punishment; dharaḥ - bearing; jighāṁsayā - ready to strike.
The club was not made of ordinary iron but of a special kind called muru.