عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم:

َلاَ تُكْثِرِ الضَّحِكَ فَإِنَّ كَثْرَةَ الضَّحِكِ تُمِيتُ الْقَلْبَ

رواه الترمذي.

On the authority of Abu Hurairah, may Allah be pleased with him, said :

“Do not laugh too much, for indeed increased laughter kills the heart.”

Reported by At-Tirmidhee and others.