Bhagavad Gita · 8.14

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

ananya-chetāḥ satataṁ yo māṁ smarati nityaśhaḥ tasyāhaṁ sulabhaḥ pārtha nitya-yuktasya yoginaḥ

For one who always remembers Me with an undivided mind, constantly united in yoga, I am easy to attain, O son of Pritha.

— Bhagavad Gita 8.14

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)