'That's' in the Bible

But Naomi replied, "Don't call me "Naomi'! Call me "Mara'! That's because the Almighty has dealt bitterly with me.

Stay here tonight, and in the morning, if he wants to redeem you, that’s good. Let him redeem you. But if he doesn’t want to redeem you, as the Lord lives, I will. Now lie down until morning.”