Deuteronomy 13:14
"Then shalt thou enquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is wrought among you;"
Cross References (ranked by relevance)
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:
Against an elder receive not an accusation, but before two or three witnesses.
Judge not according to the appearance, but judge righteous judgment.
He doth execute the judgment of the fatherless and widow, and loveth the stranger, in giving him food and raiment.
Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die.