ויהי בחצי הלילה וד' הכה כל בכור בארץ מצרים מבכור פרעה הישב על כסאו עד בכור השבי אשר בבית הבור.
We have reached the last of the ten makkos, plagues. This is the end of the line. Every firstborn – kol b’chor – implies that any firstborn who had the misfortune to be in Egypt at the time of the makkos bechoros, plague of the firstborn, also died. If: he was not an Egyptian; he was a tourist visiting the country; he was a temporary resident on business; he was not an Egyptian, but rather a member of a different nation – if he had a firstborn, or if he was a firstborn, he suffered the same fate as the…