John Wesley on Deuteronomy 32:15

Jeshurun - Israel whom he calls right or upright, (as the word signifies) partly by way of instruction to mind them what they professed and ought to be; and partly by way of exprobration, to shew them what a shame it was to degenerate so much from their name and profession. Kicked - As well fed cattle use to do: he grew insolent and rebellious against God and against his word and spirit.