Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated that when (Surah al-Nasr) was revealed, the Messenger of Allah (peace and blessings be upon him) was informed of his approaching death. The narrator said: He (peace and blessings be upon him) began striving harder than ever before in the matter of the Hereafter. And after that the Messenger of Allah (peace and blessings be upon him) said: "The victory and the help of Allah have come, and the people of Yemen have come." A man said: O Messenger of Allah! Who are the people of Yemen? He (peace and blessings be upon him) said: "A people whose hearts are tender and gentle. Faith is Yemeni, and understanding of the religion (fiqh) is Yemeni."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11853