It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that when Surah Nasr was revealed, the Noble Prophet (peace and blessings be upon him) said: "The people of Yemen have come to you. These people are soft-hearted, and faith, wisdom, and jurisprudence are very excellent among the people of Yemen."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 7723