One verse

Bhagavad Gita 5.6

5.6

संन्यासस्तु महाबाहो दुःखमाप्तुमयोगतः | योगयुक्तो मुनिर्ब्रह्म नचिरेणाधिगच्छति ||५-६||

saṃnyāsastu mahābāho duḥkhamāptumayogataḥ . yogayukto munirbrahma nacireṇādhigacchati ||5-6||

sannyāsaḥ
the renounced order of life
tu
but
mahā-bāho
O mighty-armed one
duḥkham
distress
āptum
afflicts one with
ayogataḥ
without devotional service
yoga-yuktaḥ
one engaged in devotional service
muniḥ
a thinker
brahma
the Supreme
na cireṇa
without delay
adhigacchati
attains

Merely renouncing all activities yet not engaging in the devotional service of the Lord cannot make one happy. But a thoughtful person engaged in devotional service can achieve the Supreme without delay.