The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 363

इति च विष्णुपुराणे ।

In plain words

And the Viṣṇu Purāṇa says the same.

Close to the Sanskrit

And thus in the Viṣṇu Purāṇa.