But the firstborn sons of Abraham’s promise were spared, provided they adhered to the Word of the LORD and painted their doors with the blood of their stand-in lamb, marking their homes like a gruesome circumcision. That night, Death passed over all of Jacob’s sons. While Egypt grieved the following morning, the covenantal nation “consecrated all [her] firstborn sons” to the LORD. Every firstborn was preserved by the blood of the lamb; every one of them now belonged to the LORD. - Stephanie Quick, The Son Not Spared