The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 18

तृतीयं प्रश्नं परिहरति त्रिभिरुत्तरैः पादैः --

In plain words

He answers the third question with three subsequent metrical lines.

Close to the Sanskrit

He answers the third question with three subsequent quarters.