Vishnupurana 3.4.p5

3.4.p5

In this way the huge Veda tree was divided into four stems, which soon spread out into an extensive forest. O Brahmin, Paila first divided the Rig-Veda and gave the two Sanhitas to Indra-Pramati and to Bhāshkali. Bhāshkali again divided his Sanhita into four and handed them over to his disciples Baudhya, Agnimathara, Yajtiawalka, and Parāçara; and they studied these secondary branches from the original O Muni.