Charak Samhita
त्र्यहमेतेन जीवन्ति लक्षणेनातुरा नराः। अरोगाणां पुनस्त्वेतत् षड्रात्रं परमुच्यते ॥७॥
These patients (having above mentioned signs), will survive for three days, and healthy individuals (having above mentioned signs) will survive maximum for 6 nights.
english translation
tryahametena jIvanti lakSaNenAturA narAH। arogANAM punastvetat SaDrAtraM paramucyate ॥7॥
hk transliteration by Sanscript