ADAB 1289:

'Abdullah said, "The person who has had something stolen from him continues to be suspicious until he is worse than the thief."

الأدب المفرد ١٢٨٩:

مَا يَزَالُ الْمَسْرُوقُ مِنْهُ يَتَظَنَّى حَتَّى يَصِيرَ أَعْظَمَ مِنَ السَّارِقِ


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al-Adab al-Mufrad > Recognition > § Section
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