To him which led his people through the wilderness - For all the manifestations of his care during a period of forty years.
For his mercy - That is, his mercy was to be measured by all the protection extended over them; by all the provision made for their needs; by all that God did to defend them; by all his interposition when attacked by their enemies; by safely bringing them to the land to which he had promised to conduct them.

Which led his people through the wilderness - It was an astonishing miracle of God to support so many hundreds of thousands of people in a wilderness totally deprived of all necessaries for the life of man, and that for the space of forty years.

To him which led his people through the (e) wilderness: for his mercy [endureth] for ever.
(e) Where for the space of forty years he showed infinite and most strange wonders.

To him which led his people through the wilderness,.... Where there was no path. This the Lord did by going before them in a pillar of cloud by day, and in a pillar of fire by night, to show them the way in which they should go, Exodus 13:21; see Psalm 78:14;
for his mercy endureth for ever; among the manifold mercies of God, shown to Israel in the wilderness, this is one taken notice of by Nehemiah, Nehemiah 9:19; that the pillar of cloud and fire, to direct them, never departed from them while in it: and this act of "leading" them not only includes the guidance of them in the way, but the provision made for them; of water out of the rock, and of manna that fell about their tents every day; and of flesh and feathered fowl, like dust, so that they wanted nothing; and also the protection of them from their enemies: all which were proofs of his constant care over them, and continual mercy to them; see Psalm 78:15.