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)
The chain is ordered from the source of the saying to the compiler: 1 = the speaker/first transmitter, the following links those who passed it on in turn, and at the bottom Muslim who compiled the work. Click a narrator to list every hadith in which he appears; the number in parentheses is how many hadiths across the collections on this site the narrator appears in.