Deuteronomy 17:4
"And it be told thee, and thou hast heard of it, and enquired diligently, and, behold, it be true, and the thing certain, that such abomination is wrought in Israel:"
Cross References (ranked by relevance)
Deuteronomy 19:18
And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;
John 7:51
Doth our law judge any man, before it hear him, and know what he doeth?
Proverbs 25:2
It is the glory of God to conceal a thing: but the honour of kings is to search out a matter.