1 Samuel 14:6-10

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

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

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

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

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