Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates: It was said: "O Messenger of Allah! What prevents the Abyssinian slaves of Banu al-Mughirah from coming to you, except that they fear you will send them back?" He ((peace and blessings be upon him)) said: "There is no good in the Abyssinians: when they are hungry they steal, and when they are full they commit fornication. However, there are two good traits in them: feeding others, and showing bravery at the time of battle."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12161