Arthashastra
पुरोहितम् अयाज्य याजन अध्यापने नियुक्तम् अमृष्यमाणं राजा अवक्षिपेत् ॥
The king shall dismiss a priest who, when ordered, refuses to teach the Vedás to an outcaste person or to officiate in a sacrificial performance (apparently) undertaken by an outcaste person (ayájya).
english translation
purohitam ayAjya yAjana adhyApane niyuktam amRSyamANaM rAjA avakSipet ॥
hk transliteration by Sanscript