Judges 6:36-40

Then Gideon said to God, “If you are truly going to use me to rescue Israel as you promised, prove it to me in this way. I will put a wool fleece on the threshing floor tonight. If the fleece is wet with dew in the morning but the ground is dry, then I will know that you are going to help me rescue Israel as you promised.” And that is just what happened. When Gideon got up early the next morning, he squeezed the fleece and wrung out a whole bowlful of water. Then Gideon said to God, “Please don’t be angry with me, but let me make one more request. Let me use the fleece for one more test. This time let the fleece remain dry while the ground around it is wet with dew.” So that night God did as Gideon asked. The fleece was dry in the morning, but the ground was covered with dew.