Proverbs 18:13

"He that answereth a matter before he heareth it, it is folly and shame unto him."

Cross References (ranked by relevance)

Doth our law judge any man, before it hear him, and know what he doeth?

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;

Proverbs 20:25

It is a snare to the man who devoureth that which is holy, and after vows to make enquiry.

Job 29:16

I was a father to the poor: and the cause which I knew not I searched out.