CC Madhya-lila 08.216 - BRS 1.2.285
Sri Caitanya-caritamrta
CC Madhya-lila
CC Madhya 8.216, Translation and Purport:
“"Although the dealings of the gopīs with Kṛṣṇa are on the platform of pure love of Godhead, such dealings are sometimes considered to be lusty. But because they are completely spiritual, Uddhava and all the other dearmost devotees of the Lord desire to participate in them."
This is a quotation from the Bhakti-rasāmṛta-sindhu (1.2.285).