Caitanya-caritāmṛta 14.160
gopī-gaṇa-madhye śreṣṭhā rādhā-ṭhākurāṇī nirmala-ujjvala-rasa-prema-ratna-khani
[gopee-gana-madhye shreshthaa raadhaa-thaakuraanee nirmala-ujjvala-rasa-prema-ratna-khani]
Blended reading (Sanskrit + English inline)
gopī-gaṇa-madhye śreṣṭhā rādhā-ṭhākurāṇī nirmala-ujjvala-rasa-prema-ratna-khani
“Of all the gopīs, Śrīmatī Rādhārāṇī is the chief. She is a jewel mine of ecstatic love and the source of all purified transcendental conjugal mellows.
My note
Source: vedabase.io