Musnad Abu Ya'la al-Mawsili 110:214

Zuhayr narrated to us, Affan narrated to us, Wuhayb narrated to us, Abdullah bin Uthman bin Khuthaym narrated to us, from Sa’id bin Jubayr, from Ibn Abbas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever claims to be the son of someone other than his father, or allies himself with someone other than his own masters, then upon him is the curse of Allah, the angels, and all of mankind."