Forty Hadith of an-Nawawi · No. 12
مِنْ حُسْنِ إِسْلَامِ الْمَرْءِ تَرْكُهُ مَا لَا يَعْنِيهِ
Part of the excellence of a person's Islam is leaving that which does not concern them.
الدِّينُ النَّصِيحَةُ
The religion is sincere advice. We said: For whom? He said: For Allah, His Book, His Messenger, and for the leaders of the Muslims and their common folk.
لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ
None of you truly believes until he loves for his brother what he loves for himself.
مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ
Whoever believes in Allah and the Last Day, let them speak good or remain silent.