Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "The Arabs are equals of one another in terms of lineage, and the slaves too are equals of one another in terms of lineage, except the weaver and the cupper."
This was also narrated through another route from Aishah (may Allah be pleased with her), and that too is weak.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13770