Bhagwad Gita
Chapter 12, Verse 16
अनपेक्षः शुचिर्दक्ष उदासीनो गतव्यथः।सर्वारम्भपरित्यागी यो मद्भक्तः स मे प्रियः।।12.16।।
A devotee who is not dependant on the ordinary course of activities, who is pure, expert, without cares, free from all pains, and who does not strive for some result, is very dear to Me.