Judges 6:37-40

behold, I will put a fleece of [freshly sheared] wool on the threshing floor. If there is dew only on the fleece, and it is dry on all the ground [around it], then I will know that You will rescue Israel through me, as You have said.” And it was so. When he got up early the next morning and squeezed the dew out of the fleece, he wrung from it a bowl full of water. Then Gideon said to God, “Do not let your anger burn against me, so that I may speak once more. Please let me make a test once more with the fleece; now let only the fleece be dry, and let there be dew on all the ground.” God did so that night; for it was dry only on the fleece, and there was dew on all the ground [around it].