Astanga Hrudaya
पट्वम्लमधुराः स्निग्धाः सृष्टविण्मूत्रमारुताः। पटोः कषायस्तस्माच्च मधुरः परमं गुरुः॥३८॥
Snigdha- while Patu (salt), Amla (sour), Madhura (sweet) are unctuous and help elimination of faeces, urine and flatus, each one more so in their succeeding order. Guru- Patu (salt), Kashaya (astringent) and Madhura (sweet) are heavy to digest, each one more so in their succeeding order.
english translation
paTvamlamadhurAH snigdhAH sRSTaviNmUtramArutAH। paToH kaSAyastasmAcca madhuraH paramaM guruH॥38॥
hk transliteration by Sanscript