Sahih Muslim
Sahih Muslim 42 a
Clarifying the superiority of Islam, and what part of it is best
Arabic hadith text
وَحَدَّثَنِي سَعِيدُ بْنُ يَحْيَى بْنِ سَعِيدٍ الأُمَوِيُّ، قَالَ حَدَّثَنِي أَبِي، حَدَّثَنَا أَبُو بُرْدَةَ بْنُ عَبْدِ اللَّهِ بْنِ أَبِي بُرْدَةَ بْنِ أَبِي مُوسَى، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَىُّ الإِسْلاَمِ أَفْضَلُ قَالَ "مَنْ سَلِمَ الْمُسْلِمُونَ مِنْ لِسَانِهِ وَيَدِهِ " .
Translation
It is narrated on the authority of Abu Musa Ash'ari
I asked the Messenger of Allah which (attribute) of Islam is more excellent. Upon this he remarked: One in which the Muslims are safe, protected from the tongue and hand of (other Muslims).