Judges 6:40

34 But the Spirit of Jehovah came upon Gideon; and he blew a trumpet; and Abiezer was gathered together after him.

35 And he sent messengers throughout all Manasseh; and they also were gathered together after him: and he sent messengers unto Asher, and unto Zebulun, and unto Naphtali; and they came up to meet them.

36 And Gideon said unto God, If thou wilt save Israel by my hand, as thou hast spoken,

37 behold, I will put a fleece of wool on the threshing-floor; if there be dew on the fleece only, and it be dry upon all the ground, then shall I know that thou wilt save Israel by my hand, as thou hast spoken.

38 And it was so; for he rose up early on the morrow, and pressed the fleece together, and wrung the dew out of the fleece, a bowlful of water.

39 And Gideon said unto God, Let not thine anger be kindled against me, and I will speak but this once: let me make trial, I pray thee, but this once with the fleece; let it now be dry only upon the fleece, and upon all the ground let there be dew.

40 And God did so that night: for it was dry upon the fleece only, and there was dew on all the ground.