Deuteronomy 19:18

Then judges shall make a thorough inquiry, and [if] it turns out that the witness is a false witness [and] he testified falsely against his brother,

Deuteronomy 13:14

then you shall inquire and examine and interrogate thoroughly, and, look! [It is] true; the thing has actually been done, this detestable thing in your midst,

Deuteronomy 17:4

and it is reported to you or you hear [about it] and you enquire [about it] thoroughly and, indeed, [the] trustworthiness of the deed [has] been established, it {has occurred}, this detestable thing, in Israel,

2 Chronicles 19:6-7

And he said to the judges, "Consider what you are doing, for you are not judging for a man but for Yahweh. Now [he is] with you in speaking justice.

Job 19:16

I call to my servant, but he does not answer; I must {personally} plead with him.

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
then you shall inquire and examine and interrogate thoroughly, and, look! [It is] true; the thing has actually been done, this detestable thing in your midst,
Deuteronomy 17:4
and it is reported to you or you hear [about it] and you enquire [about it] thoroughly and, indeed, [the] trustworthiness of the deed [has] been established, it {has occurred}, this detestable thing, in Israel,
2 Chronicles 19:6
And he said to the judges, "Consider what you are doing, for you are not judging for a man but for Yahweh. Now [he is] with you in speaking justice.
Job 19:16
I call to my servant, but he does not answer; I must {personally} plead with him.

General references

Deuteronomy 5:20
'And you shall not falsely bear evidence against your neighbor.
Deuteronomy 25:1
"When a legal dispute {takes place} between men and they come near to the court, and [the judges] judge [with respect to] them, then they shall declare the righteous [to be] in the right and they shall condemn the wicked,
John 7:51
"Our law does not condemn a man unless it first hears from him and knows what he is doing, [does it]?"