Shiva Purana
अध्यापनं याजनं च क्षत्रियस्याप्रतिग्रहः ॥ वैश्यस्य च विशेषेण मया नात्र विधीयते ॥ १२ ॥
Teaching, presiding over sacrifices and acceptance of monetary gifts are not prescribed by me for the Kṣatriya and the Vaiśya class.
english translation
adhyApanaM yAjanaM ca kSatriyasyApratigrahaH ॥ vaizyasya ca vizeSeNa mayA nAtra vidhIyate ॥ 12 ॥
hk transliteration by Sanscript