'That's' in the Bible

There is no reason why you and your people should die in war or from starvation or disease! That's what the Lord says will happen to any nation that will not be subject to the king of Babylon.

Jeremiah answered, "That's a lie! I am not deserting to the Babylonians." But Irijah would not listen to him. Irijah put Jeremiah under arrest and took him to the officials.