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दुर्जनेन समं सख्यं प्रीतिं चापि न कारयेत् । उष्णो दहति चाङ्गारः शीतः कृष्णायते करम् ॥
Never befriend a wicked person or develop affection for them. A coal, when hot, burns; when cold, it blackens the hand.
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