Astanga Hrudaya
स्वस्थानस्थस्य कायग्नेरंशा धातुषु संश्रिताः। तेषां सादातिदीप्तिभ्यां धातुवृद्धिक्षयोद्भवः॥३४॥
Kayagni- Kayagni present in its own place, has portions of itself, present in the dhatus also. Their decrease in qualities, quantities or functions give rise to increase and decrease of dhatus respectively.
english translation
svasthAnasthasya kAyagneraMzA dhAtuSu saMzritAH। teSAM sAdAtidIptibhyAM dhAtuvRddhikSayodbhavaH॥34॥
hk transliteration by Sanscript