Devibhagavatapurana 3.30.20

3.30.20

meghyaiśca paśubhirdevyā baliṃ dattvā viśaṃsitaiḥ |
daśāṃśaṃ havanaṃ kṛtvā saśaktastvaṃ bhaviṣyasi ||

O the best in the race of Raghu! You should offer the sacrifice before the Goddess of a sacred and unblameable animal, perform Japam and Homa ceremony equivalent to one-tenth of Japam. If you do all this, you will certainly be able to release Sîtâ.