Scripture Commentary Genesis 21:1-14

What does the birth of Isaac signify in relation to God's promises to Abraham and Sarah in previous chapters?
Why is Isaac's name significant? What does the name "Isaac" mean, and how does it reflect the miracle of his birth?
In what ways do names in the Bible often reflect God's purpose or intervention? How can we see that in the names of Isaac, Ishmael, and others?
What prompted Sarah to ask Abraham to send Hagar and Ishmael away? How does this reveal Sarah's emotions and concerns?
How does God show His faithfulness to Hagar and Ishmael after they are sent away?
What is the significance of God providing water in the desert for them?