John Calvin Reformed @genevareformer

21. Because there the mighty Jehovah will be to us. The two particles כי ים (ki im) often serve the place of a double affirmative, but here a reason is assigned, and they might even be appropriately rendered, For if; but I willingly retain what is more clear. The Prophet assigns the reason why the Church, which appears to resemble a movable “tent,” exceeds in stability the best founded cities.

Matthew Henry Presbyterian @wholebiblehenry

Here is a preface that commands attention; and it is fit that all should attend, both near and afar off, to what God says and does (Isa 33:13): Hear, you that are afar off, whether in place or time. Let distant regions and future ages hear what God has done.

Commenting on Isaiah 33:13-24

John Gill Reformed Baptist @doctorgill

But there the glorious Lord will be unto us a place of broad rivers and streams,.... Egypt had its Nile, and Babylon its Euphrates, but Jerusalem had no such river for its convenience, commerce, and defence; but God promises to be that to his Jerusalem, his church and people, as will answer to, and be "instead" (g) of, a river that has the broadest streams...