Genesis 31:50

If you mistreat my daughters, and if you take wives besides my daughters, [when] there is no man with us, see--God [is] a witness between me and you."

Jeremiah 42:5

Then they said to Jeremiah, "May Yahweh be against us as {a true and faithful witness} if we do not do according to all the words that Yahweh sends you for us.

Jeremiah 29:23

because they have done a disgraceful thing in Israel, and they have committed adultery with the wives of their neighbors, and they have spoken words in my name, lies that I have not commanded them, and I [am] he who knows, and [I am] a witness,' {declares} Yahweh."

Judges 11:10

And the elders of Gilead said to Jephthah, "Yahweh will be a {witness} between us; we will act according to your word."

1 Samuel 12:5

So he said to them, "Yahweh [is] witness against you, and his anointed one [is] witness this day, that you have not found anything in my hand." Then they said, "[He is] witness."

Micah 1:2

Hear, all you peoples; give heed, O earth and its fullness. And let the Lord Yahweh be against you as a witness, the Lord from {his holy temple}.

Leviticus 18:18

And you must not take [as wife] a woman with her sister, to be a rival-wife, to expose her nakedness before her {during} her life.

Malachi 2:14

But you ask, "{For what reason}?" Because Yahweh stands as a witness between you and the wife of your youth, against whom you have been unfaithful, even though she [is] your marriage partner and {your wife by covenant}.

Malachi 3:5

"Then I will approach you for judgment, and I will be a swift witness against the sorcerers and against the adulterers, and against those who swear {falsely}, and against the oppressors of [the] hired worker [with his] wages, [the] widow and [the] orphan, and {the abusers of} [the] alien, and [yet] do not fear me," says Yahweh of hosts.

Matthew 19:5-6

and said, 'On account of this a man will leave his father and his mother and will be joined to his wife, and the two will become one flesh'?

1 Thessalonians 2:5

{For never} did we come with a word of flattery, just as you know, nor with a pretext of greediness (God [is] witness),

Treasury of Scripture Knowledge

Summary

If thou shalt afflict my daughters, or if thou shalt take other wives beside my daughters, no man is with us; see, God is witness betwixt me and thee.

Bible References

Afflict

Leviticus 18:18
And you must not take [as wife] a woman with her sister, to be a rival-wife, to expose her nakedness before her {during} her life.
Matthew 19:5
and said, 'On account of this a man will leave his father and his mother and will be joined to his wife, and the two will become one flesh'?

God

Judges 11:10
And the elders of Gilead said to Jephthah, "Yahweh will be a {witness} between us; we will act according to your word."
1 Samuel 12:5
So he said to them, "Yahweh [is] witness against you, and his anointed one [is] witness this day, that you have not found anything in my hand." Then they said, "[He is] witness."
Jeremiah 29:23
because they have done a disgraceful thing in Israel, and they have committed adultery with the wives of their neighbors, and they have spoken words in my name, lies that I have not commanded them, and I [am] he who knows, and [I am] a witness,' {declares} Yahweh."
Jeremiah 42:5
Then they said to Jeremiah, "May Yahweh be against us as {a true and faithful witness} if we do not do according to all the words that Yahweh sends you for us.
Micah 1:2
Hear, all you peoples; give heed, O earth and its fullness. And let the Lord Yahweh be against you as a witness, the Lord from {his holy temple}.
Malachi 2:14
But you ask, "{For what reason}?" Because Yahweh stands as a witness between you and the wife of your youth, against whom you have been unfaithful, even though she [is] your marriage partner and {your wife by covenant}.
Malachi 3:5
"Then I will approach you for judgment, and I will be a swift witness against the sorcerers and against the adulterers, and against those who swear {falsely}, and against the oppressors of [the] hired worker [with his] wages, [the] widow and [the] orphan, and {the abusers of} [the] alien, and [yet] do not fear me," says Yahweh of hosts.
1 Thessalonians 2:5
{For never} did we come with a word of flattery, just as you know, nor with a pretext of greediness (God [is] witness),