Verses with the word cinnamon in the Old Testament (3 verses):

Exodus 30:23
Take thou also unto thee principal spices, of pure myrrh five hundred shekels, and of sweet cinnamon half so much, even two hundred and fifty shekels, and of sweet calamus two hundred and fifty shekels,

Proverbs 7:17
I have perfumed my bed with myrrh, aloes, and cinnamon.

Canticles 4:14
Spikenard and saffron; calamus and cinnamon, with all trees of frankincense; myrrh and aloes, with all the chief spices: