Three

The High Holy Number of Three!

From the Book of Armaments, Chapter 2, Verses 9-21:

...And Saint Attila raised the hand grenade up on high, saying, "O Lord, bless this Thy hand grenade that with it Thou mayest blow Thine enemies to tiny bits, in Thy mercy. And the Lord did grin and the people did feast upon the lambs and sloths and carp and anchovies and orangutans and breakfast cereals, and fruit bats and large chu... [Whereupon the friar is urged, "skip ahead a bit, brother"]... And the Lord spake, saying, "First shalt thou take out the Holy Pin, then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number be reached, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who being naughty in my sight, shall snuff it. Amen.

Arthur then holds up the Holy Hand Grenade Of Antioch and cries out "ONE! TWO! FIVE!" Sir Galahad corrects him, shouting "Three, sir!" Arthur then yells "THREE!" and hurls it at the killer rabbit. The Grenade soars through the air, accompanied by a short bit of choral music, then bounces once and explodes. Presumably the killer rabbit is dead after this, for the Knights subsequently enter the cave which it has been guarding.

This describes one of the funnier parts of Monty Python and the Holy Grail.

Three times fourteen equals 42. However, since six times nine also equals 42, three times eighteen must also equal 42.