«The Book of Proverbs mentions an emotion similar to that now described by the word schadenfreude:
"Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth: Lest the LORD see it, and it displease him, and he turn away his wrath from him." (Proverbs 24:17–18, King James Version).»
Avot 4:19 Quoting this verbatim
Translation from19. Samuel the Small would say: "When your enemy falls, do not rejoice; when he stumbles, let your heart not be gladdened. Lest G-d see, and it will displeasing in His eyes, and He will turn His wrath from him [to you]" (Proverbs 24:17-18).
So far as I know it is the only Passuq quoted verbatim as an entire Mishnah