Valmiki Ramayana Aranya Kanda Sarga 66 Shloka 16

अदृष्टगुणदोषाणाम् of those who do not know their merits and demerits, अध्रुवाणाम् unstable, तेषाम् in this, कर्मणाम् deeds, इष्टम् good, फलम् results, क्रियाम् अन्तरेण from actions, न प्रवर्तते will not be obtained.

Good results are not expected from the actions of persons who cannot distinguish between their virtues and vices, from those who are unstable in their deeds.