Śrī Caitanya Caritamrta · Text Madhya 13.110
সেই ফেন লঞা শুভানন্দ কৈল পান ।
কৃষ্ণপ্রেমরসিক তেঁহো মহাভাগ্যবান্ ॥ ১১০ ॥
sei phena lañā śubhānanda kaila pāna
kṛṣṇa-prema-rasika teṅho mahā-bhāgyavān
The foam that fell from the mouth of Śrī Caitanya Mahāprabhu was taken and drunk by Śubhānanda because he was very fortunate and expert in relishing the mellow of ecstatic love of Kṛṣṇa.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.