Bhagavad Gita · Chapter 18: Freedom through Renunciation
Bhagavad Gita 18.7
नियतस्य तु संन्यासः कर्मणो नोपपद्यते ।
मोहात्तस्य परित्यागस्तामसः परिकीर्तितः ॥
niyatasya tu saṃnyāsaḥ karmaṇo nopapadyate | mohāttasya parityāgastāmasaḥ parikīrtitaḥ ||
It is not right to give up an action that is one's duty. Abandoning it out of delusion is declared to be relinquishment of inertia.
Modern context
It is not right to abandon one's duty. Giving it up out of confusion is tamasic relinquishment. This is the worst kind: walking away from what is required simply because one is confused, overwhelmed or unwilling to think it through. It looks like letting go, but it is really a kind of collapse.