You need not explain common knowledge, the obvious, or belabor a point.    From LearnThat.org.  [yourdictionary.com]

belabor the obvious.    From Wordnet, Princeton University. 

Verb (used with object) : He kept belaboring the point long after we had agreed. ,a book that belabors the provincialism of his contemporaries.    From Dictionary.com. 

FLEISCHER: Well, you know, I can belabor the point.    From Wordnik.com.  [CNN Transcript Jan 8, 2003] Reference

Centaur archery was legendary; no need to belabor the point.    From Wordnik.com.  [A Spell For Chameleon]

And, Your Majesty, if I may, sir, not to belabor the point.    From Wordnik.com.  [CNN Transcript Jan 31, 2002] Reference

QUESTION: I won't belabor this now, but we'll do it afterwards.    From Wordnik.com.  [CNN Transcript Apr 5, 2001] Reference

GUPTA: And just to be clear -- and I don't want to belabor this.    From Wordnik.com.  [CNN Transcript Nov 7, 2009] Reference

RUMSFELD: You're not going to belabor the same subject, are you?.    From Wordnik.com.  [CNN Transcript Apr 3, 2002] Reference

O'BRIEN: And other than that, I don't think we need to belabor it.    From Wordnik.com.  [CNN Transcript Mar 9, 2002] Reference

AMY POEHLER, ACTRESS: Not to belabor the point, one specific thing.    From Wordnik.com.  [CNN Transcript Sep 29, 2008] Reference

I won't take any time away from the governor to belabor you with it.    From Wordnik.com.  [CNN Transcript - Special Event: Bush Outlines Defense and International Relations Plans - May 23, 2000] Reference

And you've heard them talked about tonight, and I won't belabor them.    From Wordnik.com.  [Remarks By President And Vp To People Of Norristown Pa] Reference

COURIC: I'm just going to ask you one more time, not to belabor the point.    From Wordnik.com.  [CNN Transcript Dec 28, 2008] Reference

"Just because I'm a warrior doesn't mean you have to belabor the obvious.".    From Wordnik.com.  [The False Mirror]

Q Not to belabor the point, but if we could just go back to September 13th.    From Wordnik.com.  [Press Briefing By Joe Lockhart] Reference

HARRIS: Let me ask this, and then he can - you know, belabor the point here.    From Wordnik.com.  [CNN Transcript Nov 6, 2002] Reference

I am not going to belabor her points -- she makes them far better than I could.    From Wordnik.com.  [Randy Susan Meyers: Reading Across the Racial Divide] Reference

They got mad at my stumbling over them, took away my parcel and began to belabor me.    From Wordnik.com.  [Ralph on the Engine The Young Fireman of the Limited Mail] Reference

We're not going to belabor this but I do want to -- I certainly have to ask about it.    From Wordnik.com.  [CNN Transcript Apr 30, 2002] Reference

KATIE COURIC, CO-HOST, NBC ` S "THE TODAY SHOW": I don ` t mean to belabor the point.    From Wordnik.com.  [CNN Transcript Sep 2, 2005] Reference

And Rob, we don't want to belabor the point about the krug (ph) here in New York City.    From Wordnik.com.  [CNN Transcript Jun 22, 2009] Reference

Now, tell me, give me a little history on this, and we don't have to belabor the point.    From Wordnik.com.  [CNN Transcript Mar 9, 2002] Reference

We will not belabor it, but here's a sampling from the chapter titled, "The Two Nicoles.".    From Wordnik.com.  [CNN Transcript Sep 14, 2007] Reference

Mike, let's -- I don't want to belabor this whole thing, but let's talk abut expectations.    From Wordnik.com.  [CNN Transcript Jun 22, 2002] Reference

He threw his right arm upward as if to escape a blow, but the old dame did not belabor him.    From Wordnik.com.  [The Dragon Painter] Reference

QUESTION: Without the use, sir, if I could belabor it a little bit, without the use of the U.S. forces?.    From Wordnik.com.  [CNN Transcript Dec 4, 2001] Reference

Julien got into the cabriolet beside the driver, who began at once to belabor vigorously his mulish animal.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

HAMMER: Not to belabor the point, but I ` m having a hard time getting past the physical - the physical part.    From Wordnik.com.  [CNN Transcript Jan 22, 2007] Reference

HAMMER: I have to tell you Bill, and I don ` t want to belabor this point, I think it ` s a little different.    From Wordnik.com.  [CNN Transcript Jan 22, 2007] Reference