Jdg 6:36-37
But before Gideon went into the battle with the assembled army, he asked for a sign from God of the success of his undertaking. “If Thou,” he said to God, “art saving Israel through my hand, as Thou hast said, behold, I lay this fleece of wool upon the floor; if there shall be dew upon the fleece only, and dryness upon all the earth (round about), I know (by this) that Thou wilt save,” etc. הצּמר גּזּת, the shorn of the wool; i.e., the fleece, the wool that had been shorn off a sheep, and still adhered together as one whole fleece. The sign which Gideon asked for, therefore, was that God would cause the dew to fall only upon a shorn fleece, which he would spread the previous night upon the floor, that is to say, upon some open ground, and that the ground all round might not be moistened by the dew.