The Nārāyaṇa section of the Śāntiparvan 12.329.18-2

Nārāyaṇīya 12.329.18-2

he svasar ayaṃ te putras tvāṣṭro viśvarūpas triśirā devānāṃ purohitaḥ pratyakṣaṃ devebhyo bhāgam adadat paroakṣam asmākam