Charak Samhita
अथ खलु त्रीणि द्रव्याणि नात्युपयुञ्जीताधिकमन्येभ्यो द्रव्येभ्यः; तद्यथा- पिप्पली, क्षारः, लवणमिति ॥१५॥
॥ Three substances contra-indicated for long term consumption and their effects on body॥ Now there are three substances whose excessive use is strictly prohibited in comparison to other ones - long pepper, alkali and salt.
english translation
atha khalu trINi dravyANi nAtyupayuJjItAdhikamanyebhyo dravyebhyaH; tadyathA- pippalI, kSAraH, lavaNamiti ॥15॥
hk transliteration by Sanscript