Four Disciples Incarnations of / Authority on Four Divisons of Vedas

1. Lord Shesha entered the body of Sage Paila. 
2. Garuda entered the body of Sage Sumantu. 
3. Lord Brahma entered Vaishampayana and 
4. Indra entered Jaimini. 

Sri Veda Vyasa made  following responsible for the spreading Vedas

1. Paila for Rig Veda, 
2. Vaishampayana for Yajur Veda, 
3. Jaimini for Sama Veda and 
4. Sumantu for Atharva Veda.