Charak Samhita
विधिभिर्वेदविहितैर्वा यजद्भिर्महात्मभिः । दृश्या स्पृश्या प्रकल्पया च यज्ञीया यज्ञसिद्धये ॥५॥
which is a visible, touchable, and applicable instrument of sacrifice conducive to the successful completion as enjoyed by the great sages performing sacrifices as per the prescribed methods in the vedas.
english translation
vidhibhirvedavihitairvA yajadbhirmahAtmabhiH । dRzyA spRzyA prakalpayA ca yajJIyA yajJasiddhaye ॥5॥
hk transliteration by Sanscript