Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates from the Prophet (peace and blessings be upon him): "Every division that was made in the Jahiliyyah remains as it was, and every division that was made in accordance with Islamic principles will remain as it is."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18286