Deuteronomy 13:14

then you shall investigate and search out [witnesses] and ask thorough questions. If it is true and the matter is established that this loathsome thing has been done among you,

Deuteronomy 17:4

and if it is told to you and you hear about it, then you shall investigate thoroughly [all the charges]. If it is confirmed beyond doubt that this detestable thing has been done in Israel,

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 10:18

He executes justice for the orphan and the widow, and shows His love for the stranger (resident alien, foreigner) by giving him food and clothing.

Isaiah 11:3-4


And He will delight in the fear of the Lord,
And He will not judge by what His eyes see,
Nor make decisions by what His ears hear;

John 7:24

Do not judge by appearance [superficially and arrogantly], but judge fairly and righteously.”

1 Timothy 5:19

Do not accept an accusation against an elder unless it is based on [the testimony of at least] two or three witnesses.

Treasury of Scripture Knowledge

Summary

Then shalt thou inquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is wrought among you;

Bible References

General references

Deuteronomy 17:4
and if it is told to you and you hear about it, then you shall investigate thoroughly [all the charges]. If it is confirmed beyond doubt that this detestable thing has been done in Israel,
Deuteronomy 10:18
He executes justice for the orphan and the widow, and shows His love for the stranger (resident alien, foreigner) by giving him food and clothing.
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.
Isaiah 11:3

And He will delight in the fear of the Lord,
And He will not judge by what His eyes see,
Nor make decisions by what His ears hear;
John 7:24
Do not judge by appearance [superficially and arrogantly], but judge fairly and righteously.”
1 Timothy 5:19
Do not accept an accusation against an elder unless it is based on [the testimony of at least] two or three witnesses.