I Will Establish My Covenant With Isaac

In Genesis 16 Abraham list, Abraham listened to the voice of his wife and that's a bad deal. But God says to him in 21 12, whatever Sarah says to you, do as she tells you, listen to her. And what we're driven to see is that Sarah's concern is actually to protect the child of promise. So it has to be interpreted, which is why at least my Bible, it says a little footnote possibly laughing in mockery. That's right. The context and the character response. This narrative gives us a great opportunity to think in terms of how do we interpret a passage like this?