Bhagwad Gita
Chapter 6, Verse 9
सुहृन्मित्रार्युदासीनमध्यस्थद्वेष्यबन्धुषु।
साधुष्वपि च पापेषु समबुद्धिर्विशिष्यते।।6.9।।
A person is said to be still further advanced when he regards all—the honest well-wisher, friends and enemies, the envious, the pious, the sinner and those who are indifferent and impartial—with an equal mind.