What does it mean when God says, 'When I see the blood, I will pass over you'?

This phrase encapsulates God's promise to spare the Israelites from the judgment that would befall Egypt during the Passover. The application of the lamb's blood served as a sign of faith and obedience, symbolizing the need for a substitute to bear the penalty of sin. In a New Testament context, Christ's blood acts similarly for believers, providing a divine assurance that God's wrath will not fall upon them. This underscores the importance of faith in the sufficiency of Christ's sacrifice for salvation.