The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 553

भूर्भुवः स्वस्तरुस्तारः सविता प्रपितामहः ।यज्ञो यज्ञपतिर्यज्वा

In plain words

The divine tree spanning the three worlds, the Deliverer who helps beings cross the ocean of existence, the Procreator of all, the Great-grandfather of the cosmos, the embodiment of Sacrifice, the Lord of Sacrifice, and the Performer of sacred rites.

Close to the Sanskrit

Bhūrbhuvaḥsvastaruḥ, Tāraḥ, Savitā, Prapitāmahaḥ, Yajñaḥ, Yajñapatiḥ, Yajvā.