The Compendium of Kāśyapa 8.6.72.p1

8.6.72.p1

eṣāṃ trayāṇāṃ dvikānāmekaiko dvikastribhiritaraiḥ kaṭutiktakaṣāyai

Each one of these three dual combinations should be combined with the other three tastes—pungent, bitter, and astringent;