CC Madhya 18.7

saba gopī haite rādhā kṛṣṇera preyasī
taiche rādhā-kuṇḍa priya ‘priyāra sarasī’
Word for word: 
saba — all; gopī — the gopīs; haite — from; rādhā — Rādhārāṇī; kṛṣṇera — of Lord Kṛṣṇa; preyasī — most beloved; taiche — similarly; rādhā-kuṇḍa — Rādhā-kuṇḍa; priya — very dear; priyāra sarasī — the lake of the most beloved Rādhārāṇī.
Translation: 
“Of all the gopīs, Rādhārāṇī is the dearmost. Similarly, the lake known as Rādhā-kuṇḍa is very dear to the Lord because it is very dear to Śrīmatī Rādhārāṇī.