Ramayana
यो हि मोहाद्विषं पीत्वा नावगच्छति दुर्मतिः । स तस्य परिणामान्ते जानीते कर्मणः फलम् ॥ 7-15-19 ॥
Indeed, just as a foolish man who in his delusion drinks poison does not realize it, but at the end of its working comes to know the fruit of his deed,
english translation