Exodus 4:27

On the way at a lodging place, the LORD met Moses and wanted to kill him.

Then Zipporah took a flint, and cut off the foreskin of her son, and cast it at his feet; and she said, “Surely you are a bridegroom of blood to me.”

So he let him alone. Then she said, “You are a bridegroom of blood,” because of the circumcision.

Moses told Aaron all the LORD’s words with which he had sent him, and all the signs with which he had instructed him.

Moses and Aaron went and gathered together all the elders of the children of Israel.

Aaron spoke all the words which the LORD had spoken to Moses, and did the signs in the sight of the people.