The end of God’s armor listed in Ephesians 6:10-18 is prayer. Prayer is our weapon against the enemy. I love Joshua 8. He set up an ambush behind Ai. Verse 3 says, “…Joshua chose thirty thousand mighty men of valor and sent them away by night.”

He instructed them to wait for his signal. Verse 14 says that the enemy, “…did not know there was an ambush against him behind the city.” In verse 18 the Lord told Joshua to stretch out his spear toward Ai, “…for I will give it into your hand…”

The moment he stretched out his spear, the men in ambush arose and set fire to the city. Verse 20 says, “And when the men of Ai looked behind them, they saw, and behold, the smoke of the city ascended to heaven. So they had no power to flee this way or that…”

That is the power of the body of Christ on their prayer knees. The enemy does not know until he is ambushed. He’s powerless to retaliate because he doesn’t know where the fire is coming from.