tat tathety anvamaṁsata

iti-thus; abhivyahrtam-the words that were spoken; tasyah-Her; akarnya-after hearing; asura-puṅgavah-the chiefs of the demons; apramana-vidah-because they were all foolish; tasyah-of Her; tat-those words; tatha-let it be so; iti-thus; anvamamsata-agreed to accept.