John Calvin on Luke 7:31-32

31. To what shall I compare? He does not include all the men of his age, but speaks particularly of the scribes and their followers. He charges them with this reproach, that while the Lord endeavored, by various methods, to draw them to himself, they repelled his grace with incorrigible obstinacy. He employs a comparison, which was probably taken from a common amusement of children; for there is probability in the conjecture, that the children divided themselves into two bands, and sang in that manner. And, indeed, I think that, in order to abase the pride of the scribes, Christ intentionally borrowed from children the materials of his reproof: thus declaring that, however distinguished they were, nothing more was necessary to condemn them than a song which children were wont to sing in the market-place for their amusement.