حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنِ الزُّهْرِيِّ، عَنْ عَلِيِّ بْنِ حُسَيْنٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم
" إِنَّ مِنْ حُسْنِ إِسْلاَمِ الْمَرْءِ تَرْكَهُ مَا لاَ يَعْنِيهِ "
Ali bin Al-Husain narrated that the Messenger of Allah (s.a.w) said:
"Surely, of the excellence of a person's Islam is that he leaves what does not concern him."
Reported by At-Tirmidhi (No. 2318), Malik (No. 1638) and Ahmad (No. 1646).