NASB
""So I said to you, 'Let My son go that he may serve Me'; but you have refused to let him go. Behold, I will kill your son, your firstborn."'""
— Exodus 4:23, NASB
“And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.”
“and I have said unto thee, Let my son go, that he may serve me; and thou hast refused to let him go: behold, I will slay thy son, thy first-born. ”
“and I have said to you, "Let my son go, that he may serve me;" and you have refused to let him go. Behold, I will kill your son, your firstborn.'"”
“and I said to you,‘Let my son go that he may serve me,’ but since you have refused to let him go, I will surely kill your son, your firstborn!”’””
“I have said to thee: Let my son go, that he may serve me, and thou wouldst not let him go: behold I will kill thy son, thy firstborn.”
“And I said to you, Let my son go, so that he may give me worship; and you did not let him go: so now I will put the first of your sons to death.”
“And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.”
So Moses took his wife and his sons and mounted them on a donkey, and returned to the land of Egypt. Moses also took the staff of God in his hand.
The LORD said to Moses, "When you go back to Egypt see that you perform before Pharaoh all the wonders which I have put in your power; but I will harden his heart so that he will not let the people go.
"Then you shall say to Pharaoh, 'Thus says the LORD, "Israel is My son, My firstborn.
"So I said to you, 'Let My son go that he may serve Me'; but you have refused to let him go. Behold, I will kill your son, your firstborn."'"
Now it came about at the lodging place on the way that the LORD met him and sought to put him to death.
Then Zipporah took a flint and cut off her son's foreskin and threw it at Moses' feet, and she said, "You are indeed a bridegroom of blood to me."
So He let him alone. At that time she said, "You are a bridegroom of blood"--because of the circumcision.