Bhagavad Gita 12.6

Verily, those who surrender their actions to Me, who contemplate Me, worship Me, and meditate on Me alone, with no thought other than Me.

ये तु सर्वाणि कर्माणि मयि संन्यस्य मत्पराः।अनन्येनैव योगेन मां ध्यायन्त उपासते॥

ye tu sarvāṇi karmāṇi mayi saṃnyasya matparāḥ|ananyenaiva yogena māṃ dhyāyanta upāsate||

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