Astanga Hrudaya
लघुरम्लः कटुस्तस्मात्तस्मादपि च तिक्तकः। संयोगाः सप्तपञ्चाशत्कल्पना तु त्रिषष्टिधा॥३९॥
Amla- While Amla (sour), Katu (pungent) and Tikta (bitter) are easy to digest, each one more so in their succeeding orde. Rasa Samyoga Samkhya – number of combination of tastes:- The combination of tastes will be fifty seven, but their actual counting will be sixty three,
english translation
laghuramlaH kaTustasmAttasmAdapi ca tiktakaH। saMyogAH saptapaJcAzatkalpanA tu triSaSTidhA॥39॥
hk transliteration by Sanscript