Bhagavad Gita 5.6

संतस्तु महाबाहो दु:खमाप्तुमयोगत: |
योगयुक्तो मुनिर्ब्रह्म नचिरेणाधिगच्छति

Translation

Perfect renunciation (karm sanyās) is difficult to attain without performing work in devotion (karm yog), O mighty-armed Arjun, but the sage who is adept in karm yog quickly attains the Supreme.