“Then Gideon said to God. ‘In order to see whether you will deliver Israel by my hand, as you have said, I am going to lay 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 deliver Israel by my hand, as you have said.’ It was so. When he rose early the next morning and squeezed the fleece, he wrung enough dew from the fleece to fill a bowl with water. Then Gideon said to God. ‘Do not let your anger burn against me. Let me speak one more time. Let me, please, make trial with the fleece just once more. Let it be dry only on the fleece, and on all the ground let there be dew.’ God did so that night. It was dry on the fleece only. On all the ground there was dew.”
Gideon is still not sure whether he will be successful or not. Although the Spirit of Yahweh had come upon him, he still wanted to test God. He reverses the test with two different versions of fleece with dew and without dew. Each time, it comes true. This kind of test can be found in many folklore stories.