The Great Epic of the Bhārata dynasty 1.57.72

1.57.72

pādāpasāriṇaṃ dharmaṃ vidvānsa tu yuge yuge |
āyuḥ śaktiṃ ca martyānāṃ yugānugamavekṣya ca || 72 ||

"And it was thus that Vyasa was born of Satyavati through Parasara. And because he was born in an island, he was called Dwaipayana (Dwaipa or islandborn). And the learned Dwaipayana, beholding that virtue is destined to become lame by one leg each yuga (she having four legs in all) and that the period of life and the strength of men followed the yugas, and moved by the desire of obtaining the favour of Brahman and the Brahmanas, arranged the Vedas. And for this he came to be called Vyasa (the arranger or compiler).