Charak Samhita
लेखाभिश्चन्द्रवक्राभिर्ललाटमुपचीयते। यस्य तस्यायुषः षड्भिर्मासैरन्तं समादिशेत् ॥९॥
A person, on whose forehead crescent shaped grooves develop, is supposed to die after six months.
english translation
lekhAbhizcandravakrAbhirlalATamupacIyate। yasya tasyAyuSaH SaDbhirmAsairantaM samAdizet ॥9॥
hk transliteration by Sanscript