“But Joshua commanded the people, You shall not shout or make your voice heard, neither shall any word go out of your mouth, until the day I tell you to shout. Then you shall shout.” Joshua 6:10 (ESV)
They all shouted and the walls of Jericho fell. I don’t believe that’s the biggest miracle in the story. The day the walls fell, the Israelites silently circled the city seven times and then shouted when they heard the trumpets sound. Prior to that, they silently circled the city once a day for six days. The power of synergy is certainly seen in the combined shouts of millions of Israelites. Some kind of sonic miracle that caused walls to crumble yet didn’t burst their ear drums took place. Still the greatest miracle is that they were able to circle the city a total of 13 times silently – no grumbling, no complaining! Wow!