Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "The Tulaqa' (the freed ones) of Quraysh and the 'Utaqa' (the emancipated ones) of Thaqif are allies of one another in this world and the Hereafter."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2301