1 Samuel 14:10
But if they say, 'Come up against us,' we will go up. For in that case the Lord has given them into our hand -- it will be a sign to us."
Genesis 24:14
I will say to a young woman, 'Please lower your jar so I may drink.' May the one you have chosen for your servant Isaac reply, 'Drink, and I'll give your camels water too.' In this way I will know that you have been faithful to my master."
Judges 6:36
Gideon said to God, "If you really intend to use me to deliver Israel, as you promised, then give me a sign as proof.
Judges 7:11
and listen to what they are saying. Then you will be brave and attack the camp." So he went down with Purah his servant to where the sentries were guarding the camp.
1 Samuel 10:7
"When these signs have taken place, do whatever your hand finds to do, for God will be with you.
Isaiah 7:11-14
"Ask for a confirming sign from the Lord your God. You can even ask for something miraculous."