Josh 6:1-5
Jericho was shut up tight as a drum because of the People of Israel: no one going in, no one coming out.
2 GOD spoke to Joshua, "Look sharp now. I've already given Jericho to you, along with its king and its crack troops. 3 Here's what you are to do: March around the city, all your soldiers. Circle the city once. Repeat this for six days. 4 Have seven priests carry seven ram's horn trumpets in front of the Chest. On the seventh day march around the city seven times, the priests blowing away on the trumpets. 5 And then, a long blast on the ram's horn — when you hear that, all the people are to shout at the top of their lungs. The city wall will collapse at once. All the people are to enter, every man straight on in."

This is a good example of faith. This wasn’t something that THEY could do, rather this was about what God had done.