The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 236

इति विष्णुपुराणे श्रीपराशरेणोपसंहृतम् ।

In plain words

This is how the revered Parāśara draws it all together and closes it, in the Viṣṇu Purāṇa.

Close to the Sanskrit

Thus, in the Viṣṇu Purāṇa, it has been summed up by the revered Parāśara.