Bible

Also in the Bible we can find hot and cold contrast,which is used to represent the contrast between natural elements and also in the manner of speaking "neither cold and hot".

Genesi 8,22

Finché durerà la terra,seme e messe,freddo e caldo,estate e inverno,giorno e notte non cesseranno.
As long as the earth lasts, seedtime and harvest, cold and heat, Summer and winter, and day and night shall not cease.

Apocalisse 3,15

Conosco le tue opere: tu non sei né freddo né caldo. Magari tu fossi freddo o caldo!
I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.

Apocalisse 3,16

Ma poiché sei tiepido, non sei cioè né freddo né caldo, sto per vomitarti dalla mia bocca.
So then because thou art lukewarm, and neither cold nor hot, I will spew thee out of my mouth.