We just finished learning about מכת בכורות. The word בכורות means first born and the Egyptians’ first born sons died when the מלאך המות (the angel of Death) came through מצרים. Before the plague began, ה׳ promised משה that פרעה would finally give in and let them go. משה warned פרעה about מכת בכורות before the plague began. Before the plague all of the Jews had to cover their door posts in lamb blood. Our מזוזות remind us about the lamb blood that the Jews put on their doors. המלאך המות came overnight and killed all of the first born Egyptians and the first born Egyptian animals. פרעה awoke in the middle of the night to the sound of the Egyptians screaming and then he summoned משה ואהרון to his palace. There פרעה told them to leave Egypt with all of the nation and their animals. All of the first born Egyptians died that night, even פרעה’s own son! Why didn’t פרעה die during מכת בכורות, because he also was a first born? פרעה didn’t die because ה׳ wanted פרעה to realize that ה׳ is powerful and that he is the only god.