Matthew Poole and continuators on Deuteronomy 32:15

15 But Jesurun waxed fat and kicked : thou art waxen fat, thou art grown thick, thou art covered with fatness : then he forsook God which made him, and lightly esteemed the Rock of his salvation.

(i. e.) Israel, as is agreed by Christian and Iewish Interpreters, whom he calls right or upright or righteous, (as the word signifies) not that they were so indeed, but partly by way of instruction to mind them what they professed and promised and ought to be; and partly by way of exprobration, to shew them how unlike they were to the people of God which they pretended to be, and what a shame it was to them to degenerate so much from their name and profession.

As well fed and wanton cattel use to do: he grew insolent and rebellious against God and against his word and spirit.

Which is here rightly understood and supplied, by comparing this place with Iob 15. 27. Psal. 17. 10.

Marginal references: Isa. 44. 2.; Neh. 9. 25. Jer. 2. 7. and 5. 7. Hos. 13. 6.