It is narrated from Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him), who said: the Messenger of Allah (peace and blessings be upon him) said: "There is no (new) alliance in Islam, and whatever alliance was made in the Jahiliyyah, Islam has only made it stronger."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1584