Devibhagavatapurana 3.30.14

3.30.14

tava janma ca kākutstha tasya nāśāya cāmaraiḥ |
prārthitasya hareraṃśādajavaṃśe'pyajanmanaḥ ||

O Kâkutstha! When the Devas prayed for the destruction of that wicked insolent Râvana, difficult to be subdued, you are born on this earth, in the family of Aja, as a part incarnate of Hari, beyond birth, old age and death.