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مِنْ حُسْنِ إِسْلاَمِ الْمَرْءِ تَرْكُهُ مَا لاَ يَعْنِيهِ

حَدِيثٌ حَسَنٌ، رَوَاهُ التِّرْمِذِيُّ وَغَيْرَهُ هكَذَا

On the authority of Abu Hurairah, radiyallahu 'anhu, who said : The Messenger of Allah, sallallahu 'alayhi wasallam, said :

"Part of the perfection of someone's Islam is his leaving alone that which does not concern him."

[Hadith hasan - Recorded by Tirmidhi]