21 On the way the Lord said to Moses:When you get to Egypt, go to the king and work the miracles I have shown you. But I will make him so stubborn that he will refuse to let my people go.
22 Then tell him that I have said, “Israel is my firstborn son,
23 and I commanded you to release him, so he could worship me. But you refused, and now I will kill your firstborn son.”
24 One night while Moses was in camp, the Lord was about to kill him.
25 But Zipporah circumcised her son with a flint knife. She touched his legs with the skin she had cut off and said, “My dear son, this blood will protect you.”
26 So the Lord did not harm Moses. Then Zipporah said, “Yes, my dear, you are safe because of this circumcision.”
27 The Lord sent Aaron to meet Moses in the desert. So Aaron met Moses at Mount Sinai and greeted him with a kiss.