1 Samuel 14:10
But if they say this, 'Come up to us!' then we will go up; for Yahweh has delivered them into our hand. This shall be the sign to us."
Genesis 24:14
Let it happen, that the young lady to whom I will say, 'Please let down your pitcher, that I may drink,' and she will say, 'Drink, and I will also give your camels a drink,' -- let her be the one you have appointed for your servant Isaac. By this I will know that you have shown kindness to my master."
Judges 6:36
Gideon said to God, "If you will save Israel by my hand, as you have spoken,
Judges 7:11
and you shall hear what they say; and afterward your hands will be strengthened to go down into the camp." Then went he down with Purah his servant to the outermost part of the armed men who were in the camp.
1 Samuel 10:7
Let it be, when these signs have come to you, that you do as occasion shall serve you; for God is with you.
Isaiah 7:11-14
"Ask a sign of Yahweh your God; ask it either in the depth, or in the height above."