Brihat Parashara Hora Shastra
न देयं परशिष्याय नास्तिकाय शठय वा । दत्ते प्रतिदिनं दुःखं जायते नात्र संशयः ॥ ८ ॥
Woeful forever, doubtlessly, will it be to impart knowledge of this science to an unwilling student, to a heterodox and to a crafty person.
english translation
na deyaM paraziSyAya nAstikAya zaThaya vA । datte pratidinaM duHkhaM jAyate nAtra saMzayaH ॥ 8 ॥
hk transliteration by Sanscript