God does not appear to be offended by Abraham's laughter nor by his suggestion that the covenant be established through Ishmael. He patiently explains that Abraham's legitimate wife, not Hagar, will have a son, as He said all along. It was Sarah who lost patience with God's promise and her infertility. God shows himself more patient than Abraham and Sarah both.
For reflection: How and when has God been patient with me?
Let us pray. Lord of Patience, thank you for all the occasions that you have been patient with me. . . . Forgive me for all the times I have been impatient with you.