Musnad Abu Ya'la al-Mawsili 109:97

Narrated to us Mansur ibn Abi Muzahim, narrated to us Muhammad ibn al-Khattab al-Basri, from Ali ibn Zayd, from Muhammad ibn al-Munkadir, from Jabir ibn Abdullah, that the Prophet, peace and blessings of Allah be upon him, said in a hadith of his: "When the Arabs are humiliated, Islam is humiliated."