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.
Jewish Publication Society of America Version (JPS1917) - Exodus 4:23 >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.' —