Kandal was a Bajoran who wrote several prophecies.

In 2267, Major Kira Nerys read Kandal's prophecies to see how she could use the Orb of Time to return the USS Defiant to the year 2373. Kandal's writings helped her to successfully return the Defiant to its own time. (DS9 novelization: Trials and Tribble-ations)

The word "Kandal" can be found in the pronunciation guide of the script of "Trials and Tribble-ations", suggesting that the reference to Kandal was unfilmed or deleted from the episode. [1]