Genesis 21

"Therefore she said to Abraham, “Cast out this bondwoman and her son; for the son of this bondwoman shall not be heir with my son, namely with Isaac.” 11 And the matter was very displeasing in Abraham’s sight because of his son." vv.10-11

Read chapter 21.
Why does Sarah seem so harsh here?  From something she made happen years before by giving her maidservant to her husband, she now wants to get rid of something she wanted.   How often does that happen in our own lives when we try to take matters into our own hands and then we get the so much better prize from the Lord?  We may regret and still have to deal with our decisions from the past.  God continues in His promise to Abraham through both Sarah and Hagar and tells Abraham to continue to honor his relationship with Sarah by listening to her and not worry for God will provide for Hagar and Ishmael.  I wonder if this is a "Let go and let God" moment, but also the shared submission between a husband and wife