Hadith 648
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: It was asked, "O Messenger of Allah! Who is the most honorable?" The Prophet (peace and blessings be upon him) said: "The one who is the most pious." The people said, "We are not asking you about this." The Prophet (peace and blessings be upon him) said: "Then are you asking about the chiefs of the Arabs? Those among you who were considered the best in the pre-Islamic period will also be considered the best in Islam, provided they gain understanding (of religious teachings)."