'That's' in the Bible

Saul told his young man, "That's a good suggestion! Come on, let's go!" Then they entered the town where the man of God was.

Then one of the people responded: "Your father strictly ordered the army to take an oath. That's why he said, "Cursed is the person who eats food today,' and so the army is exhausted."

He said, "Please let me go because our family has a sacrifice in the town, and my brother has ordered me to come. Now, if it's acceptable to you, please let me get away so I can see my brothers.' That's the reason he didn't come to the king's table."