John 8:17

Even in your own law it is written that the testimony of two persons is true [valid and admissible].

Deuteronomy 17:6

On the evidence of two or three witnesses, he who is to die shall be put to death; he shall not be put to death on the evidence of [only] one witness.

Matthew 18:16

But if he does not listen, take along with you one or two others, so that every word may be confirmed by the testimony of two or three witnesses.

Deuteronomy 19:15

“A single witness shall not appear in a trial against a man for any wrong or any sin which he has committed; [only] on the testimony or evidence of two or three witnesses shall a charge be confirmed.

1 Kings 21:10

and seat two worthless and unprincipled men opposite him, and have them testify against him, saying, ‘You cursed God and the king.’ Then take him out and stone him to death.”

John 10:34

Jesus answered them, “Is it not written in your Law, ‘I said, you are gods [human judges representing God, not divine beings]’?

John 15:25

But [this is so] that the word which has been written in their Law would be fulfilled, ‘They hated Me without a cause.’

2 Corinthians 13:1

This is the third time that I am visiting you. Every fact shall be sustained and confirmed by the testimony of two or three witnesses.

Galatians 3:24

with the result that the Law has become our tutor and our disciplinarian to guide us to Christ, so that we may be justified [that is, declared free of the guilt of sin and its penalty, and placed in right standing with God] by faith.

Galatians 4:21

Tell me, you who are bent on being under the Law, do you not listen to [what] the Law [really says]?

Hebrews 10:28

Anyone who has ignored and set aside the Law of Moses is put to death without mercy on the testimony of two or three witnesses.

1 John 5:9

If we accept [as we do] the testimony of men [that is, if we are willing to take the sworn statements of fallible humans as evidence], the testimony of God is greater [far more authoritative]; for this is the testimony of God, that He has testified regarding His Son.

Revelation 11:3

And I will grant authority to My two witnesses, and they will prophesy for twelve hundred and sixty days (forty-two months; three and one-half years), dressed in sackcloth.”

Treasury of Scripture Knowledge

Bible References

Also

John 10:34
Jesus answered them, “Is it not written in your Law, ‘I said, you are gods [human judges representing God, not divine beings]’?
John 15:25
But [this is so] that the word which has been written in their Law would be fulfilled, ‘They hated Me without a cause.’
Galatians 3:24
with the result that the Law has become our tutor and our disciplinarian to guide us to Christ, so that we may be justified [that is, declared free of the guilt of sin and its penalty, and placed in right standing with God] by faith.
Galatians 4:21
Tell me, you who are bent on being under the Law, do you not listen to [what] the Law [really says]?

That

Deuteronomy 17:6
On the evidence of two or three witnesses, he who is to die shall be put to death; he shall not be put to death on the evidence of [only] one witness.
Deuteronomy 19:15
“A single witness shall not appear in a trial against a man for any wrong or any sin which he has committed; [only] on the testimony or evidence of two or three witnesses shall a charge be confirmed.
1 Kings 21:10
and seat two worthless and unprincipled men opposite him, and have them testify against him, saying, ‘You cursed God and the king.’ Then take him out and stone him to death.”
Matthew 18:16
But if he does not listen, take along with you one or two others, so that every word may be confirmed by the testimony of two or three witnesses.
2 Corinthians 13:1
This is the third time that I am visiting you. Every fact shall be sustained and confirmed by the testimony of two or three witnesses.
Hebrews 10:28
Anyone who has ignored and set aside the Law of Moses is put to death without mercy on the testimony of two or three witnesses.
1 John 5:9
If we accept [as we do] the testimony of men [that is, if we are willing to take the sworn statements of fallible humans as evidence], the testimony of God is greater [far more authoritative]; for this is the testimony of God, that He has testified regarding His Son.
Revelation 11:3
And I will grant authority to My two witnesses, and they will prophesy for twelve hundred and sixty days (forty-two months; three and one-half years), dressed in sackcloth.”

General references

Numbers 35:30
‘If anyone kills a person [intentionally], the murderer shall be put to death on the testimony of [two or more] witnesses; but no one shall be put to death on the testimony of [only] one witness.
Deuteronomy 17:6
On the evidence of two or three witnesses, he who is to die shall be put to death; he shall not be put to death on the evidence of [only] one witness.