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तत्प्रतिष्ठा तदमृतं लोकास्तद्ब्रह्म तद्यशः ।
In plain words
That is the ground everything stands on; that is the deathless. The worlds are that. That is brahman; that is glory.
Close to the Sanskrit
That is the support, that the immortal; the worlds — that is brahman, that is glory.