Musnad Ahmad 1012:120

'Abdullah narrated to us, Suwayd ibn Sa'id al-Harawi narrated to us, Yahya ibn Sulaym narrated to us, from Ibn Khuthaym, from Isma'il ibn 'Ubayd ibn Rifa'ah, from his father 'Ubayd, from 'Ubadah ibn as-Samit, who said: I heard Abu al-Qasim (may Allah bless him and grant him peace) saying: "There will be in charge of your affairs after me men who will recognize for you what you disapprove of, and they will disapprove of what you recognize. So, there is no obedience to the one who disobeys Allah; do not use your Lord as an excuse."