Judges 6:36-38

Then Gideon said to God, “If you will save Israel by my hand, as you have said, behold, I am laying a fleece of wool on the threshing floor. If there is dew on the fleece alone, and it is dry on all the ground, then I shall know that you will save Israel by my hand, as you have said.” And it was so. When he rose early next morning and squeezed the fleece, he wrung enough dew from the fleece to fill a bowl with water.