That led them... — Each comparison is singularly appropriate. Israel passes through the sea as a horse through the wide grassy plain (not the sandy desert, as “wilderness” suggests). Then, when its wanderings are over, it passes into Canaan, as a herd of cattle descends from the hills into the rich pasturage of the valleys, that guidance also coming from the Spirit of Jehovah.
Related Commentaries of Isaiah 63:13
Isaiah 63:13-14
13 That led them through the deep, as an horse in the wilderness, that they should not stumble?
14 As a beast goeth down into the valley, the Spirit of the LORD caused him to rest: so didst thou lead thy people, to make thyself a glorious name.