mṛdhe vṛtra-puraḥsarāḥ

rudraih-by the Rudras; vasubhih-by the Vasus; adityaih-by the Adityas; asvibhyam-by the Asvini-kumaras; pitr-by the Pitas; vahnibhih-and the Vahnis; marudbhih-by the Maruts; rbhubhih-by the Rbhus; sadhyaih-by the Sadhyas; visve-devaih-by the Visvadevas; marut-patim-Indra, the heavenly King; drstva-seeing; vajra-dharam-bearing the thunderbolt; sakram-another name of Indra; rocamanam-shining; svaya-by his own; sriya-opulence; na-not; amrsyan-tolerated; asurah-all the demons; rajan-O King; mrdhe-in the fight; vrtra-purahsarah-headed by Vrtrasura.