John Calvin Commentary Isaiah 35:6

"Then shall the lame man leap as a hart, and the tongue of the dumb shall sing; for in the wilderness shall waters break out, and streams in the desert." — Isaiah 35:6 (ASV)

For waters shall be dug. He next adds other blessings with which believers will be abundantly supplied as soon as the kingdom of Christ is set up; as if he had said, that there will be no reason to dread scarcity or want when we have been reconciled to God through Christ, because perfect happiness flows to us from him.

But he represents this happiness to us through metaphorical expressions; and, first, he says that waters shall be dug; because, where formerly all was barren, there the highest fertility will be found.

Now, we are poor and barren unless God blesses us through Christ; for he alone, brings with him the blessing of the Father, which he bestows upon us. Wicked men, indeed, have often a great abundance of good things, but their wealth is wretched; for they do not have Christ, from whom alone proceeds a true and salutary abundance of all blessings. Death unquestionably would be more desirable than that abundance of wine and of food with which we, at the same time, swallow the curse of God. When, therefore, Christ will gloriously arise, rivers and waters will flow out and yield true and valuable advantage.