Rasarnavasudhakara 3.141.p2

3.141.p2

yathā tatraiva aṣṭamāṅke [8.16 padyād anantaram], karaṅkaḥ (janāntikam)-sakhe kañkāla devaḥ kumbhakarṇaṃ prabodhayati | na punar ātmānam | kiṃ ca prayatnena bodhito' py asau rāmeṇa punaḥ śāyitavya eva |

As in that very work, in the eighth act, Karaṅka (aside): "Friend Kaṅkāla, His Majesty awakens Kumbhakarṇa, but not himself. Moreover, though awakened with effort, he is surely to be put to sleep again by Rāma."