Judges 6:36-37

36Gideon said to God, ‘I want to know that you will do what you have promised to me. If you will really use me to rescue Israel, please show me that it is true.

37I will do this: I will put the wool of a sheep's skin out on the stone floor. During the night, please cause the dew to make it wet. If it is wet but the ground around it is dry, I will know that it is true. You will use me to rescue Israel, as you have promised.’