atha - thereupon; nārāyaṇaḥ devaḥ - Lord Nārāyaṇa (Kṛṣṇa); tam - him (the Śiva-jvara); dṛṣṭvā - seeing; vyasṛjat - released; jvaram - His personified fever (of extreme cold, as opposed to the extreme heat of the Śiva-jvara); māheśvaraḥ - of Lord Māheśvara; vaiṣṇavaḥ - of Lord Viṣṇu; ca - and; yuyudhāte - fought; jvarau - the two fevers; ubhau - against each other.

Seeing this personified weapon approach, Lord Nārāyaṇa then released His own personified fever weapon, the Viṣṇu-jvara. The Śiva-jvara and Viṣṇu-jvara thus battled each other.