Sayyiduna Abu al-Tufayl (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) said: "I saw in a dream black sheep followed by dust-coloured sheep. I interpreted it to mean that the black sheep are the Arabs and the dust-coloured sheep are the non-Arabs."
Al-Bazzar recorded it; its chain contains Ali bin Zayd, who is thiqah (trustworthy) but has a poor memory; the remaining narrators of this narration are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التعبير / 11768