The Compendium of Kāśyapa 8.6.73.p2

8.6.73.p2

trayāṇāṃ rasānāṃ kaṭukatiktakaṣāyāṇāṃ pūrvoktaistribhirdvikaiḥ pratyekaikaśyena yojayitavyāḥ tena catuṣkā niṣpadyante | tadyathā--madhurāmlakaṭutiktaḥ madhurāmlakaṭukaṣāyaḥ madhurāmlatiktakaṣāyaḥ madhuralavaṇakaṭutiktaḥ madhuralavaṇakaṭukaṣāyaḥ madhuralavaṇatiktakaṣāyaḥ amlalavaṇakaṭutiktaḥ amlalavaṇakaṭukaṣāyaḥ amlalavaṇatiktakaṣāya iti

to be combined individually one by one with the aforementioned three dual combinations of the latter three tastes—pungent, bitter, and astringent; thereby quadruple combinations are produced, namely: sweet-sour-pungent-bitter, sweet-sour-pungent-astringent, sweet-sour-bitter-astringent, sweet-salty-pungent-bitter, sweet-salty-pungent-astringent, sweet-salty-bitter-astringent, sour-salty-pungent-bitter, sour-salty-pungent-astringent, and sour-salty-bitter-astringent.