Bhagavad Gita 18.57

Surrender your actions to Me, live in Me, focus your intellect on Me, and always think of Me.

चेतसा सर्वकर्माणि मयि संन्यस्य मत्परः।बुद्धियोगमुपाश्रित्य मच्चित्तः सततं भव॥

cetasā sarvakarmāṇi mayi saṃnyasya matparaḥ|buddhiyogamupāśritya maccittaḥ satataṃ bhava||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).