Jamieson, Fausset and Brown on Deuteronomy 32:13-14

13-14. He made him ride on the high places, &c.--All these expressions seem to have peculiar reference to their home in the trans-jordanic territory, that being the extent of Palestine that they had seen at the time when Moses is represented as uttering these words. "The high places" and "the fields" are specially applicable to the tablelands of Gilead as are the allusions to the herds and flocks, the honey of the wild bees which hive in the crevices of the rocks, the oil from the olive as it grew singly or in small clumps on the tops of hills where scarcely anything else would grow, the finest wheat (Psa 81:16; 147:14), and the prolific vintage.