'That's' in the Bible

The LORD of the Heavenly Armies has sworn: "Surely as I have planned, that's what she will become; and just as I have determined, so will it remain

at that time the LORD spoke through Amoz's son Isaiah: "Go loosen the sackcloth that's around your waist, and take your sandals off your feet." So that's what he did: he went around naked and barefoot.

At that time, with his fierce, mighty, and powerful sword, the LORD will punish the gliding serpent Leviathan the coiling serpent Leviathan and he will kill the dragon that's in the sea.

That's why King Hezekiah's officials came to Isaiah.