Charles Ellicott Commentary Isaiah 58:14

"then shalt thou delight thyself in Jehovah; and I will make thee to ride upon the high places of the earth; and I will feed thee with the heritage of Jacob thy father: for the mouth of Jehovah hath spoken it." — Isaiah 58:14 (ASV)

I will cause thee to ride upon the high, places of the earth. —Better, of the land: i.e., of Canaan, the idea being that of a victorious march to occupy all commanding positions, and thus connecting itself with the full enjoyment of the heritage of Israel in the next clause.