CC Madhya 9.305
vaiṣṇava sakala paḍe ‘kṛṣṇa-karṇāmṛta’
The brāhmaṇa community there was composed of pure devotees. They regularly studied a book entitled Kṛṣṇa-karṇāmṛta, which was composed by Bilvamaṅgala Ṭhākura.
This book was composed by Bilvamaṅgala Ṭhākura in 112 verses. There are two or three other books bearing the same name, and there are also two commentaries on Bilvamaṅgala’s book. One commentary was written by Kṛṣṇadāsa Kavirāja Gosvāmī and the other by Caitanya dāsa Gosvāmī.