Bhagavad Gita Verse 9.30

यदि कोई अतिशय दुराचारी भी अनन्यभावसे मेरा भक्त होकर मुझको भजता है तो वह साधु ही माननेयोग्य है; क्योंकि वह यथार्थ निश्चयवाला है । अर्थात् उसने भलीभाँति निश्चय कर लिया है कि परमेश्वरके भजनके समान अन्य कुछ भी नहीं है|

O Arjuna, you must realize that even if the most evil of men become My devotee and worship Me with a steady and even mind, fully focusing his thoughts and concentrating on Me, he should be considered a saint and a wise man because he is a man of steady wisdom and intelligence since he possesses a decisive mind.