CC Ādi 5.135

kabhu guru, kabhu sakhā, kabhu bhṛtya-līlā
pūrve yena tina-bhāve vraje kaila khelā
Word for word: 
kabhu — sometimes; guru — spiritual master; kabhu — sometimes; sakhā — friend; kabhu — sometimes; bhṛtya-līlā — pastimes as a servant; pūrve — formerly; yena — as; tina-bhāve — in three different moods; vraje — in Vṛndāvana; kaila khelā — plays with Kṛṣṇa.
Translation: 
Sometimes He serves Lord Caitanya as His guru, sometimes as His friend and sometimes as His servant, just as Lord Balarāma played with Lord Kṛṣṇa in these three different moods in Vraja.