Charak Samhita
दन्तीद्रवन्त्योः कल्पेन सौवीरकतुषोदके। अजगन्धाजशृङ्ग्योश्च तद्वत् स्यातां विरेचने॥१७॥
Sauviraka and tushodaka as said in context of danti and dravanti as well with ajagandha and ajashringi should be prepared with saptala & shankhini which act as purgative.
english translation
dantIdravantyoH kalpena sauvIrakatuSodake। ajagandhAjazRGgyozca tadvat syAtAM virecane॥17॥
hk transliteration by Sanscript