Hadith 2244
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450. Amīr al-mu’minīn, peace be upon him, said: Whenever a man cuts a joke he separates away a bit from his wit.
۴۵۰. وَقَالَ (عليه السلام): مَا مَزَحَ امْرُؤٌ مَزْحَةً إِلَّا مَجَّ مِنْ عَقْلِهِ مَجَّةً.