Charak Samhita
वत्सकातिविषे पाठां दुःस्पर्शां हिङ्गु चित्रकम्। चूर्णीकृत्य पलाशाग्रक्षारे मूत्रस्रुते पचेत्॥१८६॥
॥ Chaturtha-kshara॥ Vatsaka, ativisha, patha, duhasparsha, hingu and chitraka should be powdered together and mixed with palashagrakshara. It is cooked in cow’s urine in an iron pan till it becomes semisolid.
english translation
vatsakAtiviSe pAThAM duHsparzAM hiGgu citrakam। cUrNIkRtya palAzAgrakSAre mUtrasrute pacet॥186॥
hk transliteration by Sanscript