Musnad Ahmad 962:24

Al-Walid ibn Muslim narrated to us, Abd al-Aziz ibn Ismail ibn Ubayd Allah narrated to me, that Sulayman ibn Habib narrated to them, from Abu Umamah al-Bahili, from the Messenger of Allah, peace and blessings of Allah be upon him, who said: "The bonds of Islam will surely be undone, bond by bond. Every time a bond is undone, the people will cling to the one that follows it. The first of them to be undone is the ruling (governance), and the last of them is the prayer."