Judges 11:10

And the responsible men of Gilead said to Jephthah, May the Lord be our witness: we will certainly do as you say.

Jeremiah 42:5

Then they said to Jeremiah, May the Lord be a true witness against us in good faith, if we do not do everything which the Lord your God sends you to say to us.

Genesis 31:50

If you are cruel to my daughters, or if you take other wives in addition to my daughters, then though no man is there to see, God will be the witness between us.

Jeremiah 29:23

Because they have done shame in Israel, and have taken their neighbours' wives, and in my name have said false words, which I did not give them orders to say; and I myself am the witness, says the Lord.

Genesis 16:5

And Sarai said to Abram, May my wrong be on you: I gave you my servant for your wife and when she saw that she was with child, she no longer had any respect for me: may the Lord be judge between you and me.

Genesis 21:23

Now, then, give me your oath, in the name of God, that you will not be false to me or to my sons after me, but that as I have been good to you, so you will be to me and to this land where you have been living.

Genesis 31:53

May the God of Abraham and the God of Nahor, the God of their father, be our judge. Then Jacob took an oath by the Fear of his father Isaac.

Exodus 20:7

You are not to make use of the name of the Lord your God for an evil purpose; whoever takes the Lord's name on his lips for an evil purpose will be judged a sinner by the Lord

Deuteronomy 1:16

And at that time I gave orders to your judges, saying, Let all questions between your brothers come before you for hearing, and give decisions uprightly between a man and his brother or one from another nation who is with him.

1 Samuel 12:5

Then he said, The Lord is witness against you, and the man on whom he has put the holy oil is witness this day that you have seen no wrong in me. And they said, He is witness.

1 Samuel 24:12

May the Lord be judge between me and you, and may the Lord give me my rights against you, but my hand will never be lifted up against you.

Zechariah 5:4

And I will send it out, says the Lord of armies, and it will go into the house of the thief and into the house of him who takes a false oath by my name: and it will be in his house, causing its complete destruction, with its woodwork and its stones.

Malachi 3:5

And I will come near to you for judging; I will quickly be a witness against the wonder-workers, against those who have been untrue in married life, against those who take false oaths; against those who keep back from the servant his payment, and who are hard on the widow and the child without a father, who do not give his rights to the man from a strange country, and have no fear of me, says the Lord of armies.

Romans 1:9

For God is my witness, whose servant I am in spirit in the good news of his Son, that you are at all times in my memory and in my prayers,

2 Corinthians 11:31

The God and Father of our Lord Jesus Christ, to whom be praise for ever, is witness that the things which I say are true.

Treasury of Scripture Knowledge

Summary

And the elders of Gilead said unto Jephthah, The LORD be witness between us, if we do not so according to thy words.

Bible References

Be witness

Genesis 16:5
And Sarai said to Abram, May my wrong be on you: I gave you my servant for your wife and when she saw that she was with child, she no longer had any respect for me: may the Lord be judge between you and me.
Genesis 31:53
May the God of Abraham and the God of Nahor, the God of their father, be our judge. Then Jacob took an oath by the Fear of his father Isaac.
Deuteronomy 1:16
And at that time I gave orders to your judges, saying, Let all questions between your brothers come before you for hearing, and give decisions uprightly between a man and his brother or one from another nation who is with him.
1 Samuel 24:12
May the Lord be judge between me and you, and may the Lord give me my rights against you, but my hand will never be lifted up against you.

If we do

Exodus 20:7
You are not to make use of the name of the Lord your God for an evil purpose; whoever takes the Lord's name on his lips for an evil purpose will be judged a sinner by the Lord
Zechariah 5:4
And I will send it out, says the Lord of armies, and it will go into the house of the thief and into the house of him who takes a false oath by my name: and it will be in his house, causing its complete destruction, with its woodwork and its stones.
Malachi 3:5
And I will come near to you for judging; I will quickly be a witness against the wonder-workers, against those who have been untrue in married life, against those who take false oaths; against those who keep back from the servant his payment, and who are hard on the widow and the child without a father, who do not give his rights to the man from a strange country, and have no fear of me, says the Lord of armies.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain