Hebrews 11:28-31 - By faith the walls of Jericho fell

11:28

This definitely refers to the exodus. Moses was instructed to apply the lamb's blood to the houses, and all Israel was instructed to do likewise. It was the application of the blood that protected Israel from the angel of death. So in this verse and the preceding one we see application to the Hebrew’s present situation. They faced opposition, and the Moses example shows that this has often been the case. Secondly, it is the blood of the lamb that protects from the wrath of God.

11:29

Next comes the Red Sea. Moses had faith in God when they were faced with the Red Sea in front of them and the Egyptian army behind them. He held up his staff and the Red Sea parted to let them through on dry land. However, when the Egyptian army sought to chase after them they were drowned by the sea. Faith saves!

11:30,31

We now move on to after the exodus and the entry into the Promised Land. So these two examples include the Israelites after the exodus, and also a person who was a Gentile but united herself with the Israelites. So the examples would apply to both the Jewish Christians and to Gentiles Chrisitans who had close associations with the Jews. Both examples concern the fall of Jericho (Josh 5:13-6:27), the first concerning the fall of the walls themselves, and the second to the prostitute Rahab who helped the Jewish spies.