Brahmanda Purana 2.34.9

Brahmāṇḍapurāṇa 2.34.9

satataṃ dhyānasaṃyukto rāmo matimatāṃ varaḥ /
ārādhayāmāsa vibhuṃ kṛṣṇaṃ kalmaṣanāśanam //