It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The faith of the Berber will not go beyond his collarbones."
Only Abd al-Mun'im (may Allah have mercy on him) narrated this hadith from Ibn Abi Dhi'b (may Allah have mercy on him).