All these learned scholars, in their turn, rendered their entrusted Vedas unto their many disciples, granddisciples and great-granddisciples, and thus the respective branches of the followers of the Vedas came into being.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
त एत ऋषयो वेदं स्वं स्वं व्यस्यन्ननेकधा । शिष्यैः प्रशिष्यैस्तच्छिष्यैर्वेदास्ते शाखिनोऽभवन्
ta eta ṛṣayo vedaṃ svaṃ svaṃ vyasyannanekadhā | śiṣyaiḥ praśiṣyaistacchiṣyairvedāste śākhino'bhavan
SB 1.4.23