It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "On the top of the hump of every camel there is a devil, so keep these camels subdued by using them (for riding and work)."
No one narrated this hadith from Ja'far bin Muhammad (may Allah have mercy on him) except al-Qasim bin Ghusn (may Allah have mercy on him), while Muhammad bin Abd al-Aziz (may Allah have mercy on him) is alone in narrating it from him.
Hadith Referenceالمعجم الأوسط / باب الميم / 6688
Hadith Gradingمحدثین:إسناده ضعيف لضعف القاسم بن غصن
Hadith Takhrij«قال الهيثمي: وفيه القاسم بن غصن وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 10، ص 131»»