prāptāḥ sahasraśaḥ

adhvaryuna-by the priest, Bhrgu; huyamane-oblations being offered; devah-demigods; utpetuh-became manifested; ojasa-with great strength; rbhavah-the Rbhus; nama-named; tapasa-by penance; somam-Soma; praptah-having achieved; sahasrasah-by the thousands.