Charak Samhita
निष्ठ्यूतं च पुरीषं च रेतश्चाम्भसि मज्जति। यस्य तस्यायुषः प्राप्तमन्तमाहुर्मनीषिणः ॥१८॥
॥ Poor prognosis based on sputum, stool and semen test॥ If a man’s sputum, feces and semen sink into water, the wise physicians say that he has come to the end of his life.
english translation
niSThyUtaM ca purISaM ca retazcAmbhasi majjati। yasya tasyAyuSaH prAptamantamAhurmanISiNaH ॥18॥
hk transliteration by Sanscript