CC Ādi 4.211

sahāyā guravaḥ śiṣyā
bhujiṣyā bāndhavāḥ striyaḥ
satyaṁ vadāmi te pārtha
gopyaḥ kiṁ me bhavanti na
Word for word: 
sahāyāḥ — helpers; guravaḥ — teachers; śiṣyāḥ — students; bhujiṣyāḥ — servants; bāndhavāḥ — friends; striyaḥ — wives; satyam — truthfully; vadāmi — I say; te — unto you; pārtha — O Arjuna; gopyaḥ — the gopīs; kim — what; me — for Me; bhavanti — are; na — not.
Translation: 
“O Pārtha, I speak to you the truth. The gopīs are My helpers, teachers, disciples, servants, friends and consorts. I do not know what they are not to Me.”
Purport: 

This verse was spoken by Lord Kṛṣṇa in the Gopī-premāmṛta.