He caused the waters to flow... — A dead prosaic literalism makes men wonder that there is no record of such wonders on the return from Babylon. A truer insight recognises that the “water out of the rock” is, as ever, the symbol of spiritual refreshment (Isaiah 41:17-19; Isaiah 43:19-20; John 4:10).
Related Commentaries of Isaiah 48:21
Isaiah 48:21
21 And they thirsted not when he led them through the deserts: he caused the waters to flow out of the rock for them: he clave the rock also, and the waters gushed out.