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प्रमादाद्वा असुराः पराभवन्नप्रमादाद् ब्रह्मभूताः सुराश्च ।
In plain words
Heedlessness is what brought the asuras down. Vigilance is what made the gods Brahman itself.
Close to the Sanskrit
From heedlessness indeed the asuras were overcome; from heedlessness's absence the suras, and they became Brahman.