Judges 6:37-40

I will put some wool on the threshing floor. If there is dew only on the wool but all of the ground is dry, then I will know that you will use me to save Israel, as you said.” And that is just what happened. When Gideon got up early the next morning and squeezed the wool, he got a full bowl of water from it. Then Gideon said to God, “Don’t be angry with me if I ask just one more thing. Please let me make one more test. Let only the wool be dry while the ground around it gets wet with dew.” That night God did that very thing. Just the wool was dry, but the ground around it was wet with dew.