Bhagavad Gita 3.4 Chapter 3, Verse 4

न कर्मणामनारम्भान्नैष्कर्म्यं पुरुषोऽश्नुते ।
न च संन्यसनादेव सिद्धिं समधिगच्छति ॥३.४॥

na karmaṇāmanārambhānnaiṣkarmyaṃ puruṣo'śnute
na ca saṃnyasanādeva siddhiṃ samadhigacchati

Meaning

One does not attain freedom from action merely by not starting work, nor does one reach perfection merely by giving things up.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 3.4 (Chapter 3, The Yoga of Action (Karma Yoga), Verse 4)