Matthew 18:16

but if he will not hear thee, then take with thee one or two more, that the remonstrances of two or three persons may have its effect.

2 Corinthians 13:1

This is the third time I am coming to you: "in the mouth of two or three witnesses shall every word be established."

1 Timothy 5:19

don't receive any accusation against a pastor, but upon the deposition of two or three witnesses.

Hebrews 10:28

He that by two or three witnesses was convicted of violating Moses's law, was put to death without mercy.

John 8:17-18

now it is written in your law, that the testimony of two men is valid.

Treasury of Scripture Knowledge

Summary

At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death.

Bible References

General references

Matthew 18:16
but if he will not hear thee, then take with thee one or two more, that the remonstrances of two or three persons may have its effect.
John 8:17
now it is written in your law, that the testimony of two men is valid.
2 Corinthians 13:1
This is the third time I am coming to you: "in the mouth of two or three witnesses shall every word be established."
1 Timothy 5:19
don't receive any accusation against a pastor, but upon the deposition of two or three witnesses.
Hebrews 10:28
He that by two or three witnesses was convicted of violating Moses's law, was put to death without mercy.