Narrated Abu Huraira:
The Prophet owed somebody a camel of a certain age. When he came todemand it back, the Prophet said (to some people), "Give him (his due)." When the people searched for a camel of that age, they foundnone, but found a camel one year older. The Prophet said, "Give (it to)him." On that, the man remarked, "You have given me my right in full.May Allah give you in full." The Prophet said, "The best amongst you isthe one who pays the rights of others generously."
