CC Madhya 8.207

sakhīra svabhāva eka akathya-kathana
kṛṣṇa-saha nija-līlāya nāhi sakhīra mana
Word for word: 
sakhīra — of the gopīs; svabhāva — natural inclination; eka — one; akathya — inexplicable; kathana — narration; kṛṣṇa-saha — with Kṛṣṇa; nija-līlāya — in His personal pastimes; nāhi — not; sakhīra — of the gopīs; mana — the mind.
Translation: 
“There is an inexplicable fact about the natural inclinations of the gopīs. The gopīs never want to enjoy themselves with Kṛṣṇa personally.