Bhagavad-gītā 18.7
BG 18.7
Open the full passageनियतस्य तु संन्यासः कर्मणो नोपपद्यते । मोहात्तस्य परित्यागस्तामसः परिकीर्तितः ॥७॥
Sanskrit
niyatasya tu sannyāsaḥ karmaṇo nopapadyate mohāt tasya parityāgas tāmasaḥ parikīrtitaḥ
Translation
Prescribed duties should never be renounced. If one gives up his prescribed duties because of illusion, such renunciation is said to be in the mode of ignorance.