1 Samuel 14:10

But if they say, ‘Come up to us,’ we will go up, for the Lord has handed them over to us; and this shall be the sign to us.”

Genesis 24:14

now let it be that the girl to whom I say, ‘Please, let down your jar so that I may [have a] drink,’ and she replies, ‘Drink, and I will also give your camels water to drink’—may she be the one whom You have selected [as a wife] for Your servant Isaac; and by this I will know that You have shown lovingkindness (faithfulness) to my master.”

Judges 6:36

Then Gideon said to God, “If You are going to rescue Israel through me, as You have spoken,

Judges 7:11

and you will hear what they say; and afterward you will have the courage to go down against the camp.” Then he went down with Purah his servant to the outposts of the army that was in the camp.

1 Samuel 10:7

When these signs come to you, do for yourself whatever the situation requires, for God is with you.

Isaiah 7:11-14

“Ask a sign for yourself from the Lord your God [one that will convince you that God has spoken and will keep His word]; make your request as deep as Sheol or as high as heaven.”

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

This shall be a sign

1 Samuel 10:7
When these signs come to you, do for yourself whatever the situation requires, for God is with you.
Genesis 24:14
now let it be that the girl to whom I say, ‘Please, let down your jar so that I may [have a] drink,’ and she replies, ‘Drink, and I will also give your camels water to drink’—may she be the one whom You have selected [as a wife] for Your servant Isaac; and by this I will know that You have shown lovingkindness (faithfulness) to my master.”
Judges 7:11
and you will hear what they say; and afterward you will have the courage to go down against the camp.” Then he went down with Purah his servant to the outposts of the army that was in the camp.
Isaiah 7:11
“Ask a sign for yourself from the Lord your God [one that will convince you that God has spoken and will keep His word]; make your request as deep as Sheol or as high as heaven.”

General references

Genesis 15:8
But Abram said, “Lord God, by what [proof] will I know that I will inherit it?”