Isaiah
Isaiah 63:13ESV·traditional attribution

who led them through the depths? Like a horse in the desert, they did not stumble.

Matthew Henry Presbyterian @wholebiblehenry

The prophet is here, in the name of the church, taking a review, and making a thankful recognition, of God's dealings with his church all along, ever since he founded it, before he comes, in the latter end of this chapter and in the next, as a watchman upon the walls, earnestly to pray to God for his compassion towards her in her present deplorable...

Commenting on Isaiah 63:7-14

John Gill Reformed Baptist @doctorgill

That led them through the deep,.... The depths, the bottom of the sea; not through the shallow, but where the waters had been deepest, the descent greatest; and at the bottom of which might have been expected much filth and dirt to hinder them in their passage, yet through this he led them: as an horse in the wilderness; or rather, "in a plain", as...

Jamieson-Fausset-Brown Reformed @jfbcommentary

deep--literally, "the tossing and roaring sea." wilderness--rather, the "open plain" [HORSLEY], wherein there is no obstacle to cause a horse in its course the danger of stumbling.