They did not thirst when he led them through the deserts; he made water flow for them from the rock; he split the rock and the water gushed out.
21. Therefore they thirsted not. Because the Jews did not see the way opened up for their return, and because great and dangerous wildernesses intervened, the Prophet asserts the power of God, and brings forward examples of it, that they may not be terrified by any difficulty.
Here, as before, Jacob and Israel are summoned to hearken to the prophet speaking in God's name, or rather to God speaking in and by the prophet, and that as a type of the great prophet by whom God has in these last days spoken unto us, and that is sufficient: Come near therefore, and hear this.
Commenting on Isaiah 48:16-22
And they thirsted not when he led them through the deserts,.... As when he led the people of Israel through the wilderness to Canaan's land, though they sometimes thirsted for want of water, yet they were supplied with it, by which their thirst was extinguished, to which the reference here is.