إِيَّاكَ وَكَثْرَةَ الضَّحِكِ
“Beware of excessive laughter.”
The narration does not prohibit every smile or kind joke. It warns against excess that can weaken seriousness and awareness of the Hereafter. The previous level already illustrated truthful lightheartedness; here the concern is a pattern of heedlessness.
فَإِنَّهُ يُمِيتُ الْقَلْبَ
“For it deadens the heart.”
يُمِيتُ is a present-tense verb meaning “causes death.” The metaphor refers to spiritual insensitivity and reduced receptiveness to correction, not the physical death of the heart.