Matthew 18:16

But if he will not hear you, take with you one or two more, that, by the mouth of two or three witnesses, every word may be established.

John 8:17

It is also written in your law, The testimony of two is worthy of credit.

2 Corinthians 13:1

The third time am I coming to you. By the mouth of two or three witnesses, every matter shall be established.

1 Timothy 5:19

Receive not an accusation against an old man, unless before two or three witnesses.

Hebrews 10:28

He that despised Moses law, died without mercy, on the testimony of two or three witnesses:

1 John 5:7-8

For there are three that testify, the Spirit, and the water, and the blood;

Revelation 11:3

And I will give to my two witnesses, that they may prophesy a thousand two hundred and sixty days, clothed in sackcloth.

Treasury of Scripture Knowledge

Summary

But if he will not hear thee, then take with thee one or two more, that in the mouth of two or three witnesses every word may be established.

Bible References

That in

John 8:17
It is also written in your law, The testimony of two is worthy of credit.
2 Corinthians 13:1
The third time am I coming to you. By the mouth of two or three witnesses, every matter shall be established.
1 Timothy 5:19
Receive not an accusation against an old man, unless before two or three witnesses.
Hebrews 10:28
He that despised Moses law, died without mercy, on the testimony of two or three witnesses:
1 John 5:7
For there are three that testify, the Spirit, and the water, and the blood;
Revelation 11:3
And I will give to my two witnesses, that they may prophesy a thousand two hundred and sixty days, clothed in sackcloth.