Deuteronomy 19:18

The judges are to make a careful investigation, and if the witness turns out to be a liar who has falsely accused his brother,

Deuteronomy 13:14

you are to inquire, investigate, and interrogate thoroughly. If the report turns out to be true that this detestable thing has happened among you,

Deuteronomy 17:4

and if you are told or hear about it, you must investigate it thoroughly. If the report turns out to be true that this detestable thing has happened in Israel,

2 Chronicles 19:6-7

Then he said to the judges, “Consider what you are doing, for you do not judge for man, but for the Lord, who is with you in the matter of judgment.

Job 19:16

I call for my servant, but he does not answer,
even if I beg him with my own mouth.

Treasury of Scripture Knowledge

Summary

And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;

Bible References

Diligent

Deuteronomy 13:14
you are to inquire, investigate, and interrogate thoroughly. If the report turns out to be true that this detestable thing has happened among you,
Deuteronomy 17:4
and if you are told or hear about it, you must investigate it thoroughly. If the report turns out to be true that this detestable thing has happened in Israel,
2 Chronicles 19:6
Then he said to the judges, “Consider what you are doing, for you do not judge for man, but for the Lord, who is with you in the matter of judgment.
Job 19:16
I call for my servant, but he does not answer,
even if I beg him with my own mouth.

General references

Deuteronomy 5:20
Do not give dishonest testimony against your neighbor.
Deuteronomy 25:1
“If there is a dispute between men, they are to go to court, and the judges will hear their case. They will clear the innocent and condemn the guilty.
John 7:51
“Our law doesn’t judge a man before it hears from him and knows what he’s doing, does it?”

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.