1 Samuel 14:6-10

6And Jonathan said to the young man that bare his armour, Come, and let us go over unto the garrison of these uncircumcised: it may be that Yhwh will work for us: for there is no restraint to Yhwh to save by many or by few.

7And his armourbearer said unto him, Do all that is in thine heart: turn thee; behold, I am with thee according to thy heart.

8Then said Jonathan, Behold, we will pass over unto these men, and we will discover ourselves unto them.

9If they say thus unto us, Tarry until we come to you; then we will stand still in our place, and will not go up unto them.1

10But if they say thus, Come up unto us; then we will go up: for Yhwh hath delivered them into our hand: and this shall be a sign unto us.