Chapter 8 · verse 14 · gita.yoga.org

Bhagavad Gita 8.14

अनन्यचेताः सततं यो मां स्मरति नित्यशः। तस्याहं सुलभः पार्थ नित्ययुक्तस्य योगिनः

I am easily attainable by that ever-steadfast yogi who constantly and daily remembers me for a long time, not thinking of anything else with a single-minded or one-pointed focus, O Partha.