CC Madhya 14.77

kabhu eka maṇḍala, kabhu aneka maṇḍala
jala-maṇḍūka-vādye sabe bājāya karatāla
Word for word: 
kabhu eka maṇḍala — sometimes one circle; kabhu — sometimes; aneka maṇḍala — various circles; jala-maṇḍūka-vādye — like the croaking sound of frogs in the water; sabe — all of them; bājāya — play; karatāla — cymbals.
Translation: 
While in the water they sometimes formed one circle and sometimes many circles, and while in the water they used to play cymbals and imitate the croaking of frogs.