Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "When the descendants of Ma'add bin Adnan reached forty men, they attacked the camp of Musa (peace be upon him) and plundered it. So Musa bin Imran (peace be upon him) invoked against them and said: O my Lord, these are the descendants of Ma'add, who have raided my camp. Allah revealed to him: O Musa bin Imran! Do not invoke against them, for from them will come the unlettered Prophet, the warner and the bearer of glad tidings of My Paradise, and from them will come the nation that is shown mercy, the nation of Muhammad (peace and blessings be upon him), who will be content with little provision from Allah, and Allah will be pleased with little deeds from them. Allah will admit them into Paradise for saying La ilaha illallah (there is no god but Allah), because their Prophet, Muhammad bin Abdullah bin Abd al-Muttalib, will be humble in his bearing, composed in his silence, speaking wisdom and practising forbearance. I brought him forth from the best tribe of his nation, Quraysh, then I brought him forth from Banu Hashim, the choicest of Quraysh. So they are the best of the best and are heading toward the best, and his nation too is heading toward goodness."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7598