Rasarnavasudhakara 1.462

1.462

tatra bhāratī -
prayuktatvena bharatair bhāratīti nigadyate |
prastāvanopayogitvāt sāṅgaṃ tatraiva lakṣyate ||

Of these, the verbal style (bhāratī): / Because it is employed by actors (bharata), it is called bhāratī. / Because it is useful in the prologue, its characteristics along with its limbs are defined right there.