Musnad Abu Ya'la al-Mawsili 108:114

Narrated to us Mansur ibn Abi Muzahim, narrated to us Muhammad ibn Khattab al-Basri, from Ali ibn Zayd, from Muhammad ibn al-Munkadir, from Jabir ibn Abdullah, that the Prophet (peace be upon him) said: "When the Arabs are humiliated, Islam is humiliated."