What does Exodus 12:13 mean?
The final plague on Egypt (Exodus 7:21; 8:6, 17, 24; 9:6, 10, 24; 10:14, 23) will be the death of the firstborn (Exodus 11:4–6). God has given instructions to the Israelite people so that they can avoid this disaster (Exodus 12:3–7). By marking the doors of their homes with blood from a flawless lamb, they will demonstrate their faith in the Lord. So, God's wrath will "pass over" or "bypass" those homes.Elements of this first Passover symbolize and predict the ministry of the Messiah, Jesus Christ. His sacrificial death (1 Corinthians 5:7; Hebrews 10:12) after a sinless life (Hebrews 4:15) is foreshadowed by the death of the spotless lambs (John 1:29; 1 Peter 1:18–19). Those who exhibit faith in this sacrifice are saved from the penalty of sin (John 3:16–18, 36), just as those who trust God's instructions in this chapter will be spared from judgment.
Egypt will react to this incredible tragedy by insisting that the enslaved Israelites leave immediately. Other directions for the Passover evening (Exodus 12:8–11) will have the people ready for travel. They will have already asked Egyptians for jewelry (Exodus 11:1–3), giving them wealth to aid in the exodus (Exodus 12:35–36).