In the Bhagavad-gita (18.65) we find this verse:

man-mana bhava mad-bhakto mad-yaji mam namaskuru

mam evaisyasi satyam te pratijane priyo ‘si me

“Absorb your mind and heart in Me, become My devotee, worship Me, offer your obeisances to Me, and certainly you will come to Me. I make this promise to you because you are

very dear to Me.“