Natyashastra
अश्राव्यं तद्दुराचारं ग्राम्यधर्मप्रवर्तितम् । निष्ठुरं चाप्रस्तुतं च काव्यं संसदि योजितम् ॥ ३५॥
That which is unhearable, sinful, initiated by rustic duties, cruel, and inappropriate, when joined with poetry in a gathering, becomes unsuitable.
english translation
azrAvyaM taddurAcAraM grAmyadharmapravartitam । niSThuraM cAprastutaM ca kAvyaM saMsadi yojitam ॥ 35॥
hk transliteration by Sanscript