Ziyad bin Ilaqah heard Usamah bin Sharik (may Allah be pleased with him) saying: I came to some Bedouins who were asking the Prophet (peace and blessings be upon him): Is there any sin upon us in such-and-such? He (peace and blessings be upon him) said: "Allah has lifted hardship from His servants, except that whoever violates the honour of his Muslim brother, that sin remains." They said: O Messenger of Allah (peace and blessings be upon him), what is the best thing that is given to a servant? He (peace and blessings be upon him) said: "Good character."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21153