Astanga Hrudaya
चतुष्पात्पक्षिपित्तालमनोह्वालवणानि च। परितः सुतरां चातो दर्व्या तमवघट्टयेत्॥१८॥
When it begins to emit fumes, bubbles come up and attains a solid consistency, like a confection, the cauldron should be taken out from the fire.
english translation
catuSpAtpakSipittAlamanohvAlavaNAni ca। paritaH sutarAM cAto darvyA tamavaghaTTayet॥18॥
hk transliteration by Sanscript