->''"Just the place for a Snark!" the Bellman cried,\\
As he landed his crew with care;\\
Supporting each man on the top of the tide\\
By a finger entwined in his hair.\\\
"Just the place for a Snark! I have said it twice:\\
That alone should encourage the crew.\\
Just the place for a Snark! I have said it thrice:\\
What I tell you three times is true."''
-->--'''Creator/LewisCarroll''', ''The Hunting Of The Snark''

-> ''"The Rule of three is... one of those 'laws' about the Planes, about everything tending to happen in threes... or everything's composed of three parts, or there's always three choices, and so on and so forth."''
-->-- '''Morte''', ''[[VideoGame/PlanescapeTorment Torment]]''

->'''Sea Chimp:''' If white one with mouth truly ''is'' high priest, he prove it by fulfilling the ancient prophecies!\\
'''Max:''' [[GenreSavvy I bet there are three of them.]]\\
'''Sea Chimp:''' [[GenreBlind He knows our ancient traditions!]]
-->-- ''[[VideoGame/SamAndMaxFreelancePolice Sam & Max: Moai Better Blues]]''

-> ''"Who would cross the Bridge of Death must answer me these questions three!"''
-->-- '''The Old Man from Scene 24''', ''Film/MontyPythonAndTheHolyGrail''

->''"Genies don't grant just two wishes, nobody talks about the two Musketeers, and you never hear anyone say "second time's the charm.""''
-->-- The announcer [[SelfDemonstratingArticle gives three examples]] of the RuleOfThree in action, from a Hyundai car commercial

-> ''"Stories are like ''Charlie's Angels''! They should come in ''threes''!"''
-->-- '''Disco Stu''', ''Simpsons Comics #175''

-> ''"Three is a sacred number. There are three Fates, three Furies, three Olympian sons of Kronos. It is a good strong number that stands against many dangers."''
-->-- '''Chiron''', ''Literature/PercyJacksonAndTheOlympians''

-> ''"One time is happenstance, two times is coincidence, three times is intentional."''
-->-- An old adage.

-> ''"They took my dressing room, my parking space, even my writers so I don't have a funny third item!"''
-->-- '''Krusty the Clown''', ''WesternAnimation/TheSimpsons''

-> ''"[[LampshadeHanging RULE OF THREE, ASSHOLE, NOT FOUR!]]"''
-->-- '''Franchise/{{Batman}}''', after getting his back broken by Bane again, ''WesternAnimation/RobotChicken''

-> ''"So that was the year of the slow invasion. When the Earth got cubed and the Doctor came to stay. It was also when we realized something the Shakri never understood. What 'cubed' actually means. The Power of Three."''
-->-- '''Amy''', ''Series/DoctorWho'', The Power Of Three

-> ''"[[LampshadeHanging I'll bet there's even a third one]]."''
-->-- '''Reggie Watts''', ''Series/ComedyBangBang''

-> '''Snickles:''' What is it with threes? Eidolon controls three powers, Valkyrie controls three “warriors,” that Endbringer copied three capes. There are [[spoiler: three Triumvirates.]] The first with Alexandria, Eidolon, and Legend. The new one with Legend, Chevalier, and Valkyrie. And one that was hinted at with Riley, Nilbog, and Valkyrie. Taylor had three different names; Skitter, Weaver, and Khepri. There are three entities in the story. I don’t know, maybe its a coincidence.\\
'''Caladium:''' There was even a ‘three’ at the very beginning–Emma, Sophia, and Madison.
-->-- ''Wordpress'', [[http://parahumans.wordpress.com/2013/11/02/teneral-e-1/#comments commenters]] discussing this trope as it applies to ''{{Literature/Worm}}''

->''"A man and a woman had a little baby\\
Yes, they did\\
They had three in the family\\
And that's a magic number."''
--> ''WesternAnimation/SchoolhouseRock'', "Three is a Magic Number"

->'''Philia:''' That's the brute who raped my country, Thrace!\\
'''Pseudolus:''' He raped Thrace?\\
'''Philia:''' And then he came and did it again! And then again!\\
'''Pseudolus:''' He raped Thrace thrice?
-->-- '''Theatre/AFunnyThingHappenedOnTheWayToTheForum'''

->'''Bismuth:''' Hey, it's a pleasure doing [[Main/{{Pun}} Bismuth]] with you.\\
'''Steven:''' ''(laughs)'' Bismuth is so funny.\\
'''Amethyst:''' I don't know...same joke twice?\\
'''Steven:''' Well, it'll be really funny if she does it a third time.
--> ''WesternAnimation/StevenUniverse'', [[Recap/StevenUniverseS3E20Bismuth "Bismuth"]]

->'''Knuckles:''' "This is an outrage! A travesty! A plookypluck!"\\
'''Mayor Fink:''' "A plookypluck?"\\
'''Knuckles:''' "I made that last one up. Rule of threes, your majesty!"
--> ''WesternAnimation/SonicBoom'', ''Mayor Knuckles''

->''There must be something comforting about three. People always give up after three.''
--> '''Sherlock Holmes''', ''Series/{{Sherlock}}''