Shiva Purana
साक्षरा विपरीताश्च राक्षसास्त इति स्मृताः॥ तस्माद्वै विपरीतं च कर्म्म नैवाचरेद्यतिः॥ ३५ ॥
If they observe the rules they are wise. If they do not they are Rākṣasas. The ascetic shall never indulge in activities contrary to the rules.
english translation
sAkSarA viparItAzca rAkSasAsta iti smRtAH॥ tasmAdvai viparItaM ca karmma naivAcaredyatiH॥ 35 ॥
hk transliteration by Sanscript