Deuteronomy 32:15 in the King James Version
But Jeshurun 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.
Context
14 butter from the herd, and milk from the flock, with fat of lambs, rams of the breed of Bashan, and goats, with the finest of the wheat. From the blood of the grape, you drank wine.
15 But Jeshurun grew fat, and kicked. You have grown fat. You have grown thick. You have become sleek. Then he abandoned God who made him, and rejected the Rock of his salvation.
16 They moved him to jealousy with strange gods. They provoked him to anger with abominations.