gopī-gaṇa-madhye śreṣṭhā rādhā-ṭhākurāṇī
nirmala-ujjvala-rasa-prema-ratna-khani
gopī-gaṇa-madhye - of all the gopīs; śreṣṭhā - the chief; rādhā-ṭhākurāṇī - Śrīmatī Rādhārāṇī; nirmala - purified; ujjvala - brilliant; rasa - in mellows; prema - of ecstatic love; ratna-khani - the jewel mine.