Wynken, Blynken, and Nod
Referenced in an ultimately unused line of dialogue from the final draft script of the  first season episode , Wynken, Blynken, and Nod is a poem.

In the aforementioned teleplay, a relieved Spock mentioned, immediately after Charlie Evans stopped psychokinetically forcing him to recite poems, that he had thought that, if Evans had persisted for much longer, Spock would have done "Wynken, Blynken, and Nod" next.

External link 

Unused production material