The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 312

p. 312

तत्पदैकवाचकं सदामृतं निरञ्जनम् ।

In plain words

One word reaches it, and only one: 'That.' Deathless, always. Not a single stain on it.

Close to the Sanskrit

Having the single word 'tat' as its one denoter, always deathless, stainless.