Shikshasamuccaya 278

278

yena vā prakṛti-mahā-sa-āvadyatayā + a-samādāno * apy a-bhavyo bhavaty ucchinna-kuśala-mūlaś ca sutarāṃ tena sāmvarikā ity alam anayā cintayā ||

Or, because [an action] is by its very nature exceedingly blameworthy, one who has not even taken [the vows] becomes incapable and has his roots of wholesome virtue cut off, so all the more so do those who possess vows. Enough with this reflection!