Charak Samhita
षट् चैवैकरसानि स्युरेकं षड्रसमेव तु।२२। इति त्रिषष्टिर्द्रव्याणां निर्दिष्टा रससङ्ख्यया ॥२२॥
By dropping from the total complex of tastes one taste at a time, there are formed six groups of quinary tastes. Then there are six groups of single tastes and the single group of six tastes.
english translation
SaT caivaikarasAni syurekaM SaDrasameva tu।22। iti triSaSTirdravyANAM nirdiSTA rasasaGkhyayA ॥22॥
hk transliteration by Sanscript