Nafi' bin Jubayr bin Mut'im narrates from his father (Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him)) that the Messenger of Allah (peace and blessings be upon him) said: "There are no pacts of the Jahiliyyah in Islam, and whatever oath (of alliance) existed in the Jahiliyyah, Islam only makes it stronger."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12523